With storm clouds approaching, President Barack Obama and other dignitaries sing the national anthem at the 11th annual Memorial Day ceremony at Abraham Lincoln National Cemetery, Elwood, Ill., May 31, 2010. Heavy rain and lightning later forced cancelation of the event.

With storm clouds approaching, President Barack Obama and other dignitaries sing the national anthem at the 11th annual Memorial Day ceremony at Abraham Lincoln National Cemetery, Elwood, Ill., May 31, 2010. Heavy rain and lightning later forced cancelation of the event.