He 177 in Flight.
[Source: Bundesarchiv, Bild 101I-668-7163-25A/Linden/CC-BY-SA]

Close-up of the nose of a He 177.
[Source: Bundesarchiv, Bild 101I-461-0220-07/Heise/CC-BY-SA]

A He 177 during refueling and engine-run up, 1943.
[Source: Bundesarchiv, Bild 101I-674-7767-09/Keiner/CC-BY-SA]

An He 177 Grief.
[Source: Unknown]

He 177 warming up.
[Source: Unknown]

He 177A-3 cockpit.
[Source: Unknown]

Abandoned He 177.
[Source: Unknown]

A British officer inspects a destroyed He 177.
[Source: Unknown]

Sources:
Gunston, Bill - The Encyclodepia of the Worlds Combat aircraft, 1976, Chartwell Books, Inc., New York
Brown, Eric, Captain - Wings of the Luftwaffe, 1979, Airlife Publishing Ltd., Shrewsbury
Gunston, Bill & Wood, Tony - Hitler's Luftwaffe, 1977, Salamander Books Ltd., London
Donald, David - The Complete Encyclopedia Of World Aircraft, 1997, Brown Packaging Books Ltd., London
Wikipedia - Heinkel He 177