done by foreign or domestic or a individual lone act. lon woefuls and affiliated groups are certainly determined to attack. with the analysis by the f.b.i. crime line in virginia ongoing. head of the security committee told fox news new leads are expected soon. there are tracers in the gun powder and the pellets themselves and ball bearings can be traced to a manufacturer and the device itself it is the best evidence that we have. in addition to still images and video. a source tells fox news that there is a significant social media foot print. more than 30,000 social media messages were connected from 25 hours before to 24 hours after the explosion. messages that seemed out of place and quoded and tweets