It is not clear whether the Army Apache helicopter collision with the Iranian drone was intentional, and official statements only said the crash is under investigation.
A private helicopter with four people on board crashed in mountains near Phoenix, Arizona on Friday, authorities said.
Two pilots were killed after their helicopters collided in midair over Hammonton, New Jersey on Sunday.
One person is dead and another is critically injured after two helicopters collided in Hammonton, New Jersey.
All personnel were safe and in stable condition, after a Navy helicopter and a fighter jet both went down in the South China Sea, the U.S. Pacific Fleet said.
The crash happened at Huntington Beach Saturday and has left at least five people injured. It ended with the wrecked chopper tangled and dangling from several palm trees.