what does"Strangelove packets" mean?
【The bag (also known as “the black bag” and “the football”) was a thirty-pound metal suitcase with an intricate combination lock. Within were various bulky Strangelove packets, each bearing wax seals and the signatures of the Joint Chiefs.】
this passage is talking about president's black bag, I wonder what does"Strangelove packets" mean? and who are "the Joint Chiefs"?