Flights banned above site of Boston Marathon explosions

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(CNN) — As the horror of the explosions near the finish line of the nation’s most famous marathon sank in, government officials mobilized to respond on Monday afternoon.

Aviation authorities banned planes from flying over of the site of the explosion, the Federal Aviation Administrion said. The temporary flight restriction came at the request of law enforcement and extends three nautical miles in all directions, up to a height of 3,000 feet, FAA spokeswoman Arlene Salac said.