"Iceman" is a U.S Military pilot. He delivers cluster bombs. He is known to be one of the many US pilots providing fire support to other US ground forces. His current fate is unknown.
Trivia Iceman shares his call sign with LT Tom "Iceman" Kazanski from the 1986 film "Top Gun" this could be a nod to the film or just the choice of Iceman himself, although he is an Air Force Pilot, and not US Navy like Kazanski.