'Bowe Bergdahl'. Sonny references leaving leaving an area of operations, as Bergdahl did, without permission.
ISR = Intelligence, Surveillance, and Reconnaissance operations. Gathers data from all sources to generate operations as needed.
CACO = Casualty Assistance Calls Officer. Provides any support the servicemember's family may need.
2IC = 2nd in Command
During the mission, Jason radios checkpoint information to Havoc and says "pass Geno's". Geno's is a Cheesesteak restaurant in Philadelphia where David Boreanaz grew up.
EDIT: He also says at one point "Passed Pat's". Pat's is the rival cheesesteak restaurant on an opposing corner to Geno's, separated by a close few hundred feet. It is a long-standing neighborhood and business rivalry of the two, with near-religious fanaticism of favorites. A choice that divides families. Visiting Politicians hoping for soundbites patronize BOTH so as not to alienate voters.