Who are those guys?

Marines with Helicopter Support Team, Combat Logistics Battalion 8 pose for a group photo after successfully preparing M-777A2 lightweight howitzers for helicopter transport at Fire Base Fiddler's Green in Helmand province, Sept. 28, 2009. note: enlarged the pix to read the print on vest name tags L-R unreadable, unreadable, SSgt Housel, Cpl. Leonard, LCpl Kenna.
USMC photo Sgt. Christopher R. Rye