 Vehicles are particularly preferred as targets by the CIA because the drones could see who entered the vehicles and target them when they were driving in isolated areas.According to unnamed counterterrorism officials, in 2009 or 2010 CIA drones began employing smaller missiles in airstrikes in Pakistan in order to reduce civilian casualties.The new missiles, called the Small Smart Weapon or Scorpion, are reportedly about the size of a violin case (21 inches long) and weigh 16 kg.