Scores of low-flying planes circling American cities are part of a civilian air force operated by the FBI and obscured behind fictitious companies. The aircraft are equipped with high-tech cameras, and ... technology capable of tracking thousands of cellphones. The surveillance equipment is used for ongoing investigations, the FBI says, generally without a judge's approval. The Drug Enforcement Administration has its own planes, also registered to fake companies, according to a 2011 Justice Department ... report. At the time, the DEA had 92 aircraft in its fleet. And since 2007, the U.S. Marshals Service has operated an aerial surveillance program with its own fleet equipped with technology that can capture data from thousands of cellphones. These are not your grandparents' surveillance aircraft," said Jay Stanley, a senior policy analyst with the American Civil Liberties Union. Evolving technology can record higher-quality video from long distances, even at night, and can capture certain identifying information from cellphones using a device known as a "cell-site simulator" [to] trick pinpointed cellphones into revealing identification numbers of subscribers, including those not suspected of a crime. The Obama administration [has] been directing local authorities through secret agreements not to reveal their own use of the devices. During the past few weeks, the AP tracked planes from the FBI's fleet on more than 100 flights over at least 11 states plus the District of Columbia.