In modern warfare, the advantage often goes to guerrillas who can attack, then quickly hide among the population or disappear into the hills. To counter those tactics, the Pentagon since 2001 has been arming unmanned aerial vehicles to identify and destroy targets with missiles. The Defense Department is seeking weapons for UAVs that can strike enemies but limit collateral damage, especially in cities.
The Army’s solution is the Autonomous Rotorcraft Sniper System (ARSS), a small, unmanned helicopter equipped with a powerful .338-caliber rifle. An autopilot system handles the tricky business of flying while the operator lines up the kill shot on a remote monitor.