U.S. Rep. Chris Van Hollen (D-MD) is escorted into the White House by a staffer to attend a luncheon with U.S. President Barack Obama in the Private Dining Room next to the Oval Office in Washington, March 7, 2013. REUTERS/Larry Downing (UNITED STATES - Tags: POLITICS BUSINESS) 

Chris Van Dine of the U.S. jumps on his bike during the Pan-American Mountain Bike tournament training session at La Parva, some 50 km (31 miles) north-east of Santiago, March 19, 2009. REUTERS/Ivan Alvarado (CHILE SOCIETY SPORT IMAGE OF THE DAY TOP PICTURE)