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sengers with technical expertise may have switched off the transponder in the hope of flying undetected.
• No theory, however, has been ruled out in one of aviation history's most puzzling mysteries.
• The Beijing-bound aircraft last communicated with air traffic base stations east of Malaysia in the South China Sea, which for several days has the main focus of the search. Planes and ships also have been searching the Strait of Malacca west of Malaysia because of a blip on military radar suggested the plane might have turned in that direction after the last confirmed contact.
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• SEATTLE (AP) -- The FBI is refusing to run nationwide background checks on people applying to run legal marijuana businesses in Washington state, even though it has conducted similar checks in Colorado -- a discrepancy that illustrates the quandary the Justice Department faces as it allows the states to experiment with regulating a drug that's long been illegal under federal law.
• Washington state has been asking for nearly a year if the FBI would conduct background checks on its applicants, to no avail. The bureau's refusal raises the possibility that people with troublesome criminal histories could wind up with pot licenses in the state -- undermining the department's own priorities in ensuring that states keep a tight rein on the nascent industry.
• It's a strange jam for the feds, who announced last summer that they wouldn't sue to prevent Washington and Colorado from regulating marijuana after 75 years of prohibition.
• The Obama administration has said it wants the states to make sure pot revenue doesn't go to organized crime and that state marijuana industries don't become a cover for the trafficking of other illegal drugs. At the same time, it might be tough for the FBI to stomach conducting such background checks -- essentially helping the states violate federal law.
• The Justice Department declined to explain why it isn't conducting the checks in Washington when it has in Colorado. Stephen Fischer, a spokesman for the FBI's Criminal Justice Information Services Division, referred an Associated Press inquiry to DOJ headquarters, which would only issue a written statement.
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