Washington Nationals home opener (20 images)

U.S. President Barack Obama throws out the first pitch of the Washington Nationals' season opening game against the Philadelphia Phillies at Nationals Park in Washington on April 5, 2010. UPI/Kevin Dietsch

U.S. President Barack Obama throws out the first pitch of the Washington Nationals' season opening game against the Philadelphia Phillies at Nationals Park in Washington on April 5, 2010. UPI/Kevin Dietsch

U.S. President Barack Obama throws out the first pitch of the Washington Nationals' season opening game against the Philadelphia Phillies at Nationals Park in Washington on April 5, 2010. UPI/Kevin Dietsch

U.S. President Barack Obama throws out the first pitch of the Washington Nationals' season opening game against the Philadelphia Phillies at Nationals Park in Washington on April 5, 2010. UPI/Kevin Dietsch

U.S. President Barack Obama walks to the mound prior to throwing out the first pitch of the Washington Nationals' season opening game against the Philadelphia Phillies at Nationals Park in Washington on April 5, 2010. UPI/Kevin Dietsch

Washington Nationals outfielder Willie Harris catches a pop up during the first inning against the Philadelphia Phillies during the first inning at Nationals Park in Washington on April 5, 2010. UPI/Kevin Dietsch