21.   Crews were working to correct the problem, Petta said.

22.   He found Blakeley was not a danger to the public and was working to correct his drinking problem.

23.   Microsoft and VeriSign were working to correct the problem, both companies said.

24.   She said that American Express was working to correct the error.

25.   Technicians are working to correct the problem.

26.   Technicians are working to correct the error.

27.   We are working to correct them now.

28.   While on the road, Zhu tried to parry criticisms by acknowledging minor human rights breaches and noting that his government was working to correct them.

29.   Ground controllers were working to correct the problems.

30.   On Friday, Columbia astronauts worked to correct two separate computer problems and a third mechanical sensor glitch that slowed the preparations for the deployment.