Besides Logan and O'Hare, Argenbright provides security at several other airports nationwide, including Philadelphia International Airport, Newark International Airport and Washington Dulles International Airport.

CNN: License suspended for Boston Logan security firm

Hours after the measures were announced, there was an alert at Newark International Airport near New York City as a man entered a secure area without being screened.

BBC: Tougher US air screening for 'security-risk' countries

Stuck on the tarmac at Newark International Airport in his Gulfstream V on Sept. 11 and cut off from the world when his cell phone wouldn't work, EDS Chief Executive Richard Brown silently watched out a jet window as the World Trade towers across the Hudson River burned and collapsed.

FORBES: Scare Tactics