This image provided Thursday, June 18, 2009 by Chicago's Abraham Lincoln Book Shop Inc. shows an image made from an Aug. 1863 glass plate negative of President Abraham Lincoln at a portrait studio in Washington, D.C. The photo shows Lincoln with a house fly on his trouser leg just left and below his right knee. The photo proves that President Barack Obama, who swatted and killed a fly during an interview Tuesday, isn't the only president to have had an encounter with a fly. AP Photo logo AP Photo 32 months ago

This image provided Thursday, June 18, 2009 by Chicago's Abraham Lincoln Book Shop Inc. shows an image made from an Aug. 1863 glass plate negative of President Abraham Lincoln at a portrait studio in Washington, D.C. The photo shows Lincoln with a house fly on his trouser leg just left and below his right knee. The photo proves that President Barack Obama, who swatted and killed a fly during an interview Tuesday, isn't the only president to have had an encounter with a fly.