Science: Eyes in the Skies

Aerial map making is doing wonders in World War II. For example:

Allied commanders had set May 3, 1943 as the day for the climactic attack on Tunis and Bizerte. At the last moment there was a hitch: bad weather had grounded reconnaissance planes and there were no photographs of the enemy positions. The attack was postponed.

Three nights later, the needed pictures were in hand and Allied artillery opened fire on pinpointed targets. By morning, every enemy gun had been silenced. Many had received direct hits; none was missed by more than five...

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