"Osama bin laden organized an attack that was carried out against the United States, New York, Pentagon, and the other aircraft, with 19 attackers, 19 guys with box cutters. An attack that's probably cost almost nothing."

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Once committed to an attack, fly in at full speed. After scoring crippling or disabling hits, I would clear myself and then repeat the process. I never pursued the enemy once they had eluded me. Better to break off and set up again for a new assault. I always began my attacks from full strength, if possible, my ideal flying height being 22,000 ft because at that altitude I could best utilize the performance of my aircraft. Combat flying is based on the slashing attack and rough maneuvering.

— Erich Hartmann