WHO: The Federal Aviation Administration

WHAT: The FAA is missing key information on who owns one-third of the 357,000 private and commercial aircraft in the U.S. — a gap the agency fears could be exploited by terrorists and drug traffickers.

WHY: The records are in such disarray that the FAA says it is worried that criminals could buy planes without the government’s knowledge, or use the registration numbers of other aircraft to evade new computer systems designed to track suspicious flights. It has ordered all aircraft owners to re-register their planes in an effort to clean up its files.