They lost several aircraft, spent hundreds of millions, and mobilized the most elite special forces that had been tasked with killing Osama bin Laden—just to rescue one person, a regular pilot.

For many people and many countries, this is a multiple-choice question. But for Americans, it isn’t.
Not abandoning, not giving up—that is the biggest assurance that gives a soldier the courage to march onto the battlefield without hesitation.
Such a military force is truly invincible.