21.   In a further blow, two smaller airlines were grounded Friday.

22.   Six Kazak airlines have been grounded indefinitely due to overloading, overworked staff and other serious safety violations, officials said Wednesday.

23.   The airline has been grounded since December after it failed to pay fuel suppliers.

24.   That would have had the effect of grounding the airline until maintenance procedures were improved.

25.   When U.S. airlines were temporarily grounded in the days after the attacks, travelers and businesses turned to alternative forms of transportation.