Obama Pays Tribute to Sept. 11 Victims at White House, Pentagon

Obama Pays Tribute to Sept. 11 Victims at White House, Pentagon

Alex Wong/Getty Images

President Barack Obama, joined by first lady Michelle Obama on the South Lawn of the White House, commemorated the time on Sept. 11, 2001, that American Airlines Flight 11 smashed into the North Tower of the World Trade Center in New York City.