The US Air Force recently released a bunch of photos of Guardian Angels performing high altitude low opening jumps over Afghanistan.

Guardian Angels are a team of "Combat Rescue Officers, Pararescuemen [or PJs], Survival, Evasion, Resistance, and Escape (SERE) Specialists," according to the Air Force.

In other words, PJs are the enlisted special operators who perform rescue missions, while the combat rescue officers are the commissioned officers who oversee the team, an Air Force spokeswoman told Business Insider. The other airmen on the team helps with staff work, air crew equipment, and so forth.