O'Hare Airport is the "least secure airport in the country" -- and vulnerable to a terrorist attack -- because of an aviation commissioner hell-bent on building runways at the expense of security, the airport's fired security chief charged Wednesday.

Jim Maurer said he was fired from his $130,380-a-year security job in mid-September not because he "physically attacked" one of Aviation Commissioner Rosemarie Andolino's top lieutenants, as Andolino claimed, but because he raised security concerns the commissioner didn't want to hear.

Maurer's explosive charges are outlined in a lawsuit filed Wednesday against Andolino and her top deputy, Ellen O'Connor. He's seeking reinstatement, back pay and in excess of $2 million in damages for what he calls a "retaliatory discharge" and "slander" of his reputation.

Maurer's lawsuit claims that O'Connor, an assistant aviation commissioner, even went so far as to file a "false police report" claiming that Maurer had assaulted her, when he did not.

Andolino "made up this stuff to get rid of me because I was the guy who brought the turd to the punch bowl. Every time I would bring up a security issue, they didn't want to hear about it. It all cost money. It interfered with their O'Hare Modernization Program. That's all they care about," said Maurer, 63.

"O'Hare is the least secure airport in the country because of security lapses they poo-pooed every time I brought it up. I can't go into some of it because it would be so easy for some whack job to go in and shoot up the place."