By: CBS News Two members of the National Guard have been removed from Wednesday's presidential inauguration over possible ties to extremist groups, officials said. The FBI has been working to vet the 25,000 troops standing guard in the Washington, D.C., area. At a Pentagon briefing Tuesday, General Dan Hokanson, the National Guard chief, said the two members made "inappropriate comments or texts" and were sent home "out of an abundance of caution." Hokanson said one member was flagged through a tip line and one was reported by other soldiers. Ten others were also removed from duty for a "nu...