A small plane flies near Manassas Regional Airport in Manassas, Va., on May 26, 2015. The plane is among a fleet of surveillance aircraft by the FBI, which are primarily used to target suspects under federal investigation. Such planes are capable of taking video of the ground, and some _ in rare occasions _ can sweep up certain identifying cellphone data.
A small plane flies near Manassas Regional Airport in Manassas, Va., on May 26, 2015. The plane is among a fleet of surveillance aircraft by the FBI, which are primarily used to target suspects under federal investigation. Such planes are capable of taking video of the ground, and some _ in rare occasions _ can sweep up certain identifying cellphone data. Andrew Harnik AP
A small plane flies near Manassas Regional Airport in Manassas, Va., on May 26, 2015. The plane is among a fleet of surveillance aircraft by the FBI, which are primarily used to target suspects under federal investigation. Such planes are capable of taking video of the ground, and some _ in rare occasions _ can sweep up certain identifying cellphone data. Andrew Harnik AP

FBI behind mysterious surveillance aircraft over US cities

June 02, 2015 03:44 PM