Add Yahoo as a preferred source to see more of our stories on Google. Lt. John Kelvin Koelsch (Navy) First used by the 1st Air Commando in World War II, the Sikorsky R-4 often fell short of its role ...

First used by the 1st Air Commando in World War II, the Sikorsky R-4 often fell short of its role in rescuing airmen downed in the mountains and rainforests of the China-Burma-India front but as the ...