U.S. adopts ‘knock operation’ to fight the ISIS


The U.S. has adopted a unique Israeli battlefield tactic in its fight against ISIS: exploding a missile above a building to warn civilians inside that it's about to be bombed, foreign media reports.

Israeli forces have widely used the so-called knock-on-the-roof operations in Gaza attacks in recent years to try to get civilians out before they are hit.

The first public revelation of the U.S. using a "knock operation" came Tuesday at a press briefing by Air Force Maj. Gen. Peter E. Gersten, deputy commander for operations and intelligence for the anti-ISIS Operation Inherent Resolve.