Mackenzie Phillips was busted this morning at Los Angeles International Airport after allegedly trying to bring heroin and cocaine aboard an airliner. Phillips was going through security at LAX's Terminal 4 at approximately 10 a.m., when her bag was checked by a TSA officer, During a second screening process, a small amount of what was believed to be heroin and cocaine was discovered on her person. She was cut from the show "One Day at a Time" for a drug problem as well.