>> a fox news alert. a christmas terror attack shut down by the fbi in america. the suspect, a former us marine. allegedly pledged his allegiance to isis. just a couple of days before christmas. welcome to "america's news headquarters" from washington. >> the former marine who the fbi says wanted to carry on a major attack in san francisco express support for radical jihadist messages online and has stated his support for isis to authorities searching his home. will carr is following the latest on this thwarted attack to request an assist of the guys was planning what looked like a lone wolf attack on pier 39 in san francisco over christmas get the 26-year-old