U.S. Senator Mary Landrieu, center, becomes emotional during a speech by President Barack Obama on the fifth anniversary of Hurricane Katrina, August 29, 2010, at Xavier University in New Orleans. Also listening are U.S. Sen. David Vitter, right, and Landrieu's sister-in-law, Cheryl Landrieu, the wife of New Orleans mayor Mitch Landrieu. UPI/A.J. Sisco