The world has seen many a helicopter since the origin of the rotor craft, but some stand out more than others.

De Jarnette was killed on April 8, 1944, while serving as the pilot of a B-24 Liberator bomber with the 732nd Bombardment Squadron.

Although Mark Conrad began collecting German war relics as a child in Cape Girardeau, Mo., it wasn’t until the year 2001 that his collection began to take on a life of its own.