Cable cars pass over the River Thames on May 16, 2012 in London, England.

The 1 km (0.62 mile) cable car line crosses the river from the Greenwich Peninsula to the Royal Docks, linking two important Olympic sites. Up to 34 gondolas, each carrying a maximum of 10 passengers, will transport people across the river.

A light projection of the Titanic on a 500-meter-long iceberg in the Northern Polar sea of Greenland, during the night of 13 April 2012.

Maintenance workers repair part of the tracks at Northwood Hills tube station on the Metropolitan Line in London March 29, 2012.

Cleaners, known as fluffers, work in Highbury and Islington station in London March 30, 2012.

Maintenance workers take a moment's rest as they repair part of the tracks at Northwood Hills tube station on the Metropolitan Line in London March 29, 2012.

A cleaner, known as a fluffer, inspects the train tracks on the Victoria Line near Highbury and Islington station in London March 30, 2012. Transport for London (TfL), which is responsible for the majority of London's transport system, including the London Underground, expects to see an additional 500,000 passengers on the tube during the Olympics, a number that has seen many voice their concerns over whether the system can cope with the influx.

In this picture taken with a fish-eye lens, people stand around the "luminous lace" light sculpture by designers Loop.pH in the Stone Hall during a press preview at what used to be the official residence of the late Princess Diana, Kensington Palace in London, Tuesday, March 20. Kensington Palace has been transformed following a 12 million pounds ($19 million, 14.4 million euro) restoration project timed to be completed for this summer's Queen Elizabeth II's Diamond Jubilee and the London 2012 Olympics.

A dress worn by Princess Diana is displayed in Kensington Palace which reopened today after a 12 million pound Sterling (19 million USD) renovation in central London on March 20.

A woman views an art installation in the Queen's Bed Chamber in Kensington Palace on March 20 in London, England. Kensington Palace is due to reopen to the public on March 26 following an extensive renovation project. The refurbishment has seen the renovation of the King and Queen's state apartments, a display of dresses worn by Diana, Princess of Wales and an exhibition charting the life of Queen Victoria.

Models dressed as period courtiers pose for photographs on "the King's Staircase" during a press preview at what used to be the official residence of the late Princess Diana, Kensington Palace in London, Tuesday, March 20. Kensington Palace has been transformed following a 12 million pounds (US$19 million, euro14.4 million) restoration project timed to be completed for this summer's Queen Elizabeth II's Diamond Jubilee and the London 2012 Olympics.

Queen Victoria's living quarters are photographed through her devotion screen at Kensington Palace in London, Britain, on March 20. A major new exhibition unveiled as part of a 14 million euro transformation of Kensington Palace explores the life of Queen Victoria, Britain's longest serving monarch, and the palace's most famous resident Princess Diana. The Palace opens to the public on March 26.

The Titanic Belfast attraction nears completion in The Titanic Quarter on March 13 in Belfast. Belfast's Titanic Quarter is a regeneration area on the original site of the Harland and Wolff shipyard - birthplace of RMS Titanic.

An employee of The Titanic Belfast attraction stands in front of screens showing computer generated images of a restaurant on The Titanic on March 13.

A replica of the the famous staircase onboard the Titanic is on display in the new Titanic Belfast Visitor's Center.

A visitor takes a phone picture of the slipway at the Titanic Belfast attraction on March 13.

Brett Irwin of the Public Record Office moves old plans of Harland and Wolff ships from the 19th century in the Titanic Drawing Offices.

A Titanic related mural is pictured near a Loyalist paramilitary mural in Belfast, Northern Ireland, on March 13.

Sea waves hit the Blue Star Paros vessel during a nine-hour trip to the Greek islands of Paros, Naxos, Ios and Santorini, in the Aegean Sea on March 14, 2012.

A Greek passenger seen on the Blue Star Paros vessel during a nine-hour trip to the Greek islands of Paros, Naxos, Ios and Santorini.

Foreign tourists admire the volcanic island of Santorini.

An aerial view taken from a Greek military Super Puma all-weather helicopter shows a 60-meter-long yacht running adrift after taking in water in the sea area between the islands of Skyros and Psarra, central Aegean Sea, Greece on Feb. 17. All passengers and crew, eight French nationals, were airlifted from the distressed yacht and are all safe.

A handout picture provided by the Hellenic Air Force taken from a military Super Puma all-weather helicopter shows a 60-meter long yacht running adrift after taking on water between the islands of Skyros and Psarra, central Aegean Sea, Greece on Feb. 17. All the passengers and crew, eight French nationals, were airlifted from the distressed yacht and are all safe.

Sanaa is an UNESCO World Heritage site and is one of the oldest continuously inhabited cities in the world.

A craftsman works outside his shop at the Souq al-Melh market in Sanaa's Old City district in Sanaa on Feb. 15.

A man reads a Koran inside an old mosque in Sanaa's Old City district on Feb. 14.

Men chew qat, a mild stimulant, inside a shop in Sanaa's Old City district on Feb. 15.

A vendor selling donkeys waits for customers in his shop at the Souq al-Melh market in Sanaa's Old City district.

A tourists waits for a flight during a partial strike at the Ben Gurion Airport near Tel Aviv, Israel onFeb. 8. Israel's labor federation has launched a nationwide strike for the first time in five years, shutting down national and local government offices, banks, the stock exchange, rail service and seaports.Union leaders are protesting the widespread use of contract workers who earn less and do not enjoy the same benefits as workers who are directly employed.

A lone traveller sits in the usually busy departure hall of Tel Aviv's Ben Gurion Airport, Israel, on Feb. 8. Israel's federation of trade unions declared a general strike demanding better conditions for contract workers with poor job security. Government offices, city councils, trains, banks, post offices and the Tel Aviv Stock Exchange came to a standstill. Israel's Ben Gurion International Airport near Tel Aviv also shut down. A court order however limited the strike there until midday.

People wait at Ben Gurion International Airport near Tel Aviv during a strike on Feb. 8. Israel's main labour union declared a strike on Wednesday that shut airports, ports, banks and the stock market after talks with the government failed to produce an agreement on the status of workers employed through labour contractors.

People watch the Triberger waterfalls at the Black Forest in Triberg, southern Germany during temperatures far below zero, on Feb. 7, 2012.

A hiker stands behind icicles as he takes snapshots of a frozen waterfall in Bad Urach, Germany, on Feb. 7. The cold wave sweeping across Europe is expected to bring even more snow and frigid temperatures in the upcoming days.

A car drives through the snowy landscape on the Grosser Inselberg mountain in eastern Germany, on Feb. 6. The deadly cold snap that has gripped Europe for more than a week wrought more havoc across the continent, straining emergency services, grounding flights and pushing the death toll past 200.

Packed ice floes are seen from the Stadtbruecke Bridge in Frankfurt Oder, Germany, Feb. 7. The drifting ice has come to a standstill along more than 140 kilometers of the Oder River on the border between Germany and Poland.

A pedestrian walks between snowy stairways in the Olympic park in Munich, southern Germany, on Feb. 7. Temperatures plunged to new lows in Europe where last two week-long cold snap has now claimed more than 220 lives and forecasters warned that the big freeze would tighten its grip at the next time.

Young men play ice hockey on the frozen Outer Alster in Hamburg, Germany, on Feb. 7. The frozen Outer Alster could be used at one's own risk since yesterday. In some places the ice is 18 cm thick.

Ice crystals hang from a water wheel at the technical museum in Annaberg-Buchholz, eastern Germany, on Feb. 7, 2012.

A small boat passes on a canal covered with ice on Monday in Venice, Italy. Temperatures fell to 14 degrees Fahrenheit in Milan on Monday as 59,000 households remained without electricity in Italy and officials declared a gas supply emergency.

A view of the Cannaregio channel, partially iced because of unusually low temperatures, in Venice on Monday. Schools will be closed in Rome on Tuesday, as Italy copes with unusually heavy snow for the Mediterranean country. So far, ten deaths have been linked to winter weather, including two people who were crushed under a collapsed roof south of Rome, and a 91-year-old woman in the northeast port of Trieste who was knocked down by strong winds. In the north, rescuers had to pluck people from their homes, as piles of snow reached 3 meters (10 feet) in some areas. In Milan, Italy's fashion and financial capital, temperatures fell to 10 degrees Fahrenheit on Monday, and the authorities opened a section of the city subway to shelter some 100 homeless people.

A boat floats in a frozen lagoon in Venice on Monday. Bitterly cold weather sweeping across Europe claimed more victims on Sunday, brought widespread disruption to transport services, and left thousands without power with warnings that low temperatures would continue into next week.

Tourists protect themselves with umbrellas from the falling snow in front of Rome's ancient Colosseum on Feb. 3.

A man cycles through a snow storm in Rome, Italy, on Feb 3. Reports state that the severe cold has killed more than 100 people across Europe, where temperatures have in some areas have plummeted.

Scooters and motorbikes are covered with snow as they are parked downtown Rome on Feb. 3. A rare mantle of snow blanketed the historic center of Rome on Friday as temperatures in the Alpine region of Piedmont in northern Italy went as low as minus 22 Fahrenheit.

People walk on St Peter's square covered by snow on Feb. 3 at the Vatican. A rare mantle of snow blanketed the historic center of Rome on Friday.