Air refueling is the process of transmitting aviation fuel from one military aircraft to another during flight. The procedure lets the receiving aircraft to stay in the air longer, extending its range or loiter time on station. Its purpose is quite simple, but there are a number of amazing things that happen in and around the process. Here is one of the stories, which somehow did not go wrong. Before that let us look at aeromedical aspects involved in air-to-air refuelling.