Larry Mayer, The Billings Gazette | AP
A soldier waves to his family as the Montana Army National Guard 484th MP Company departs from Edwards Jet Center in Billings, Mont., on Tuesday, April 17, 2012. The unit is headed to Afghanistan.
Robert Markowitz, NASA | AP
This handout photo provided by NASA shows the Space shuttle Discovery, mounted atop a NASA 747 Shuttle Carrier Aircraft, flying over Washington skyline, including the Washington Monument, as seen from a NASA T-38 aircraft on Tuesday, April 17, 2012. Discovery, the longest-serving orbiter will be placed to its new home, the Smithsonian's National Air and Space Museum's Steven F. Udvar-Hazy Center in Chantilly, Va.
Koji Sasahara | AP
People on the ground are dwarfed by a full-size model of Japan's popular robot animation character Gundam standing in front of a new shopping mall in Tokyo's Odaiba waterfront area on Tuesday, April 17, 2012. The 60-foot-tall Gundam greets shoppers at Diver City Tokyo Plaza which opens on Thursday.
Klaus-Dietmar Gabbert | AP
Seasonal asparagus harvesters work on their vegetable crops near Elsholz, southwest of Berlin, Germany, in this aerial photo taken on Tuesday, April 17, 2012.
Itsuo Inouye | AP
The Tokyo Sky Tree soars in Tokyo on Tuesday, April 17, 2012. The world's tallest freestanding broadcast structure that stands 2,080 feet will open to the public in May.
Mukhtar Khan | AP
Police use colored water from a water cannon to disperse protesting Kashmiri government employees during a protest against the government in Srinagar, India on Tuesday, April 17, 2012. The employees demanded payment of arrears in salaries and raising of retirement age among other demands.