NEW YORK - SEPTEMBER 09:  U.S. President Barack Obama speaks at a tribute to the late television journalist Walter Cronkite September 9, 2009 at Lincoln Center in New York City. Numerous dignitaries attended the morning memorial service for the former CBS anchorman who died in July. Obama is returning to Washington later today to deliver a major prime-time address to a joint session of Congress on health care. Getty Images logo Getty Images 5 months ago

NEW YORK - SEPTEMBER 09: U.S. President Barack Obama speaks at a tribute to the late television journalist Walter Cronkite September 9, 2009 at Lincoln Center in New York City. Numerous dignitaries attended the morning memorial service for the former CBS anchorman who died in July. Obama is returning to Washington later today to deliver a major prime-time address to a joint session of Congress on health care.