As US marks 9/11, some say the biggest terror threats America now faces are homegrown | Video
Memorials are taking place across the United States to mark 22 years since the Sep 11 attacks, which killed nearly 3,000 people. The attacks led to the so-called "global war on terror", but many analysts believe the biggest threats America faces today are on its own doorstep. William Denselow reports from New York.
Memorials are taking place across the United States to mark 22 years since the Sep 11 attacks, which killed nearly 3,000 people. The attacks led to the so-called "global war on terror", but many analysts believe the biggest threats America faces today are on its own doorstep. William Denselow reports from New York.