Assigned to 335FS, 4FG, 8AF USAAF. A/C P-51B 43-7190 struck by flak while strafing Romarantin Airdrome in France. Determining he could not make it back, he called on the R/T informing his escorts of his intention to bail out. Twice he rolled the aircraft on its back and attempted to bail out. He was unable to extricate himself from the aircraft before it dove into the ground. Crashed near Soize. KIA MACR 4127.

Clemens came to the 4th Fighter Group from Fredericksburg, Texas, on 8 August 1943. He was assigned to the 335th Squadron. He had 50 missions completed when on 10 April 1944 his plane was hit by flak while strafing Romorantin Aerodrome, France.

His mustang was streaming black oil and glycol and he attempted to bail out. His wingman watched as he climbed and put his aircraft on its back and then went into a dive. He leveled off for a few seconds and went into another dive with objects flying out of the cockpit. He was then seen hanging halfway out of the cockpit as his plane dove into the ground and he was killed.

Lt. Fiedler was credited with 5.3 victories and earned the Distinguished Flying Cross with one Oak Leaf Cluster and the Air Medal with three Oak Leaf Clusters.