What a great story.
Short version: 4 days before Christmas in 1943, a German fighter pilot safely escorted a heavily damaged American bomber to safety during WWII because "He was a veteran pilot with an iron sense of right and wrong; a man who would never kick another while he's down."
Longer version (quoted from Jalopnik's post): (click the link below for the full story):
2nd Lieutenant Charlie Brown's B17 bomber, [named] Ye Old Pub, approached Bremen, Germany. As German anti-aircraft batteries opened up on the formation, one of the anti-aircraft rounds exploded right in front of their plane, destroying the number two engine and damaging number four. Missing one engine and with another throttled back due to damage, Ye Olde Pub could no longer keep up with the formation.
Things went from bad to worse for Brown and his crew. Falling behind the formation, Ye Olde Pub weathered merciless attacks from 15 German fighters. The bomber's machine guns got one of them, but the damage they sustained was immense. The tail gunner was killed and four were injured, including Brown, who caught a bullet fragment in his right shoulder. The only defensive guns left in service were the top turret and the nose gun, and the bomber's hydraulics and oxygen systems had also been knocked out.
As Ye Olde Pub attempted to leave German airspace, Lt. Franz Stigler, a Luftwaffe fighter pilot just in from shooting down two B-17s, saw Ye Olde Pub limp by and gave chase.
I saw his gunner lying in the back profusely bleeding….. so, I couldn't shoot. I tried to get him to land in Germany and he didn't react at all. So, I figured, well, turn him to Sweden, because his airplane was so shot up; 'I never saw anything flying so shot up'.
Clickable link: http://youtu.be/nNmypZ9lv94
Source -> http://jalopnik.com/5971023/why-a-german-pilot-escorted-an-american-bomber-to-safety-during-world-war-ii