Watch: Shocking video of gun-firing 'drone' lands US teen in trouble

The Federal Aviation Administration, the United States nodal agency on civil aviation, has said it was investigating a viral internet video created by an 18-year-old student Austin Haughwout, displaying a homemade "drone" firing a handgun in the Connecticut countryside. The footage shows a homemade multi-rotor hovering off the ground, buzzing furiously and firing a semiautomatic handgun four times at an unseen target. The 14-second video called "Flying Gun", which has been viewed nearly two million times, has sparked fresh debate about the still largely unregulated world of civilian drones in the United States.