The FBI is investigating claims that up to five of the terrorists who killed 68 people in a despicable attack on an upmarket Kenyan shopping mall are Americans, as the Kenyan military reported that it had rescued hostages and secured 'most parts' of the center following the two day standoff. Sources close to terror group Al Shabaab told CNN on Sunday that nine extremists had been named on their Twitter account along with their nationalities and allegedly included U.S. citizens. The account has now been suspended by the site. And just before sundown Kenya Defence Forces posted on its Twitter...