Another innovative concept that emerged during WWII was in-flight guidance onto a moving target. One of the earliest examples was the Fritz X anti-ship bomb, first deployed by the German Air Force in 1943: An operator on the launch aircraft guided the bomb to its target using radio control. Around the same time the U.S. Navy deployed an even more sophisticated anti-ship bomb called the Bat, which used radar to home isolate the target without needing a human operator. Another anti-ship homing weapon was the Zaunkoenig torpedo, fitted to German U-boats from 1943 onward, which used underwater sound waves rather than radar to locate the target.
WASHINGTON — American airstrikes have killed 25,000 Islamic State fighters in Iraq and Syria and incinerated millions of dollars plundered by the militants, according to Pentagon officials.