U.S. President Barack Obama is flanked by Vice President Joe Biden (L), Secretary of State John Kerry (2nd R) and Defense Secretary Chuck Hagel (R) as he delivers a statement on legislation sent to Congress to authorize the use of military force against the Islamic State, from the Roosevelt Room at the White House in Washington February 11, 2015. Obama asked Congress on Wednesday to authorize military force against Islamic State that would bar any large-scale invasion by U.S. ground troops and limit operations to three years. REUTERS/Jonathan Ernst (UNITED STATES - Tags: POLITICS MILITARY CONFLICT)