WASHINGTON (AP) — The Drug Enforcement Administration does a poor job overseeing the millions of dollars in payments it distributes to confidential sources, relies on tipsters who operate with minimal oversight or direction and has paid informants who are no longer meant to be used, according to a government watchdog report issued Thursday. The report said the DEA was unable to measure the reliability of its informants, improperly maintained Amtrak and Transportation and Security Administration employees as confidential sources, and had no controls or procedures for when its own sources recruit other individuals to act as "sub-sources."