Less than a week after a U.S. Special Forces team killed the world’s number one terrorist, President Barack Obama visited the site of the terrorist attack in New York on September 11, 2001.  On that day nearly 10 years ago, terrorists piloted two hijacked planes into the World Trade Center's twin towers and another into the Pentagon outside of Washington.  A fourth crashed in Pennsylvania. VOA's Carolyn Presutti has our story.