But in April 2009 the U.S. told Tronox that the DOE had frozen those funds pending discussions about the right of the U.S. to set off the Title X reimbursement against its pre-petition claims in the Tronox bankruptcy.

FORBES: Bankruptcy Judge Scolds Latham Attorney Over Disclosure Of Fee

The Nasdaq situation has set off alarms within the government because of the exchange's critical role, which officials put right up with power companies and air-traffic-control operations, all part of the nation's basic infrastructure.

WSJ: Hackers Penetrate Nasdaq's Computers