Donald Trump infamously refuses to release his tax returns, citing an audit as grounds for keeping the documents secret. But filmmaker Michael Moore and "Real Time" host Bill Maher aren't buying it. And yesterday, at LaGuardia Airport, they decided to take matters into their own hands. After attending a Mets game, Moore and Maher spotted Trump's plane at LaGuardia. The two maneuvered their way onto the runway, and afterward claimed they'd snagged the sought-after paperwork.