April 15 - April 21, 2012 (75 images)

The President's Own Marine Band marches under the Space Shuttle Enterprise during a transfer ceremony for Space Shuttle Discovery at the Smithsonian's National Air and Space Museum's Udvar-Hazy Center in Chantilly, Virginia on April 19, 2012. The Space Shuttle Discovery is replacing the Enterprise which will be transporter to the Intrepid Sea, Air and Space Museum in New York City. UPI/Kevin Dietsch

US President Barack Obama accepts a jersey from Alabama Crimson Tide players Barrett Jones (holding jersey) and Damion Square (R) as head coach Nick Saban makes remarks (L) on the South Lawn of the White House, April 19, 2012, in Washington, DC. The number *14* signifies Alabama's total national championships after they defeated LSU, 21-0, in January, for the BCS college football championship. UPI/Mike Theiler

Chicago Blackhawks left wing Brandon Bollig (L) lays out Phoenix Coyotes center Boyd Gordon during the second period of game 4 of the NHL Western Conference quarterfinals at the United Center on April 19, 2012 in Chicago. The Coyotes won 3-2 in overtime and lead the best of seven series 3-1. UPI/Brian Kersey

English actor Tom Hiddleston attends The European Premiere of "Marvel Avengers Assemble" at Vue Westfield in London on April 19, 2012. UPI/Paul Treadway