Ben Grimes was a United States Army Ranger who took part in the mission to capture terrorist mastermind Ibrahim Bin-Khalid at his compound in Yemen. Unknown to his teammates, Grimes pilfered a strongbox belonging to Bin-Khalid, containing a list of sleeper cells across the United States. When the squad's new identities were leaked, Bin-Khalid's followers executed every member of the team and their families except for Carter and Grimes, bent on finding the list in Grimes' possession.