United Farm Worker's President Arturo Rodriguez (L) and Fernando Chavez (R), son of former UFW President Cesar Chavez, walk out of the White House after watching U.S. President Barack Obama sign a proclamation in honor of Cesar Chavez Day, at the White House in Washington, March 31, 2010. REUTERS/Larry Downing (UNITED STATES - Tags: POLITICS EMPLOYMENT BUSINESS AGRICULTURE)