People wave U.S. flags and hold signs at a protest against immigration laws during a visit of President Barack Obama to El Paso May 10, 2011. Obama issued an impassioned call for immigration reform in a speech at the U.S.-Mexican border on Tuesday, sending a message to Hispanics whose votes he needs to win re-election next year. REUTERS/Gael Gonzalez (UNITED STATES - Tags: POLITICS SOCIETY CIVIL UNREST)