The boss of the security firm G4S has been asked questions by a group of MPs.
It comes after the company failed to provide enough security staff for the Olympics.
Nick Buckles has said he is "very sorry" and agreed the situation was a "shambles".
Eight police forces are having to fill gaps after workers for G4S didn't turn up to some venues on Monday, and an 3,500 extra military troops have been brought in.
Ricky's been looking into the problem.