Maybe they weren't any help during the battle. But, wouldn't you like to hear them testify to Jason Chaffetz or Jim Jordan about why they were in Lybia, what they did during the attack, or how it came to pass that they remained safe while others were attacked and killed? ...or, what they thought when they heard Hillary's fabrication about the YouTube video
Really not necessary because the details of the attack are all told in the book (and maybe the movie too?). We hear about the non shooters in the buildings. Who cares what they were doing, other than the few shooters that could have helped but didn’t, and the CIA boss of Benghazi, the useless “Bob?” I’d like to hear more about that Bob, who sounds like a total jerk.