The names of the four Marines shot and killed Thursday at military sites in Chattanooga, Tennessee have been revealed.

FOX News Radio's Jeff Monosso reports from Chattanooga:

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The fallen Marines are now identified as Gunnery Sgt. Thomas Sullivan, Lance Cpl. Skip Wells, Sgt. Carson Holmquist, and David Wyatt who were all shot in gun-free zones. The government now assessing their policies while mourners continue bringing flags and flowers to a growing makeshift memorial here.

(Mourners) "I feel sorry for the family left behind.//I think that's what the terrorist wants... for us to lay down and roll over, that's not Americans."

As U.S. officials also say that the shooter, Mohammad Abdulazeez, is being scrutinized for several trips he told he made to the Middle East in recent years, apparently evading a government terror watch list.

In Chattanooga, Jeff Monosso, FOX News Radio.

LISTEN to FOX News Radio's special coverage of a news conference on the latest from Chattanooga, Tennessee, which was held Friday: