21.   Commercial operations began in November with two airlines flying in and out.

22.   D-Day is the day on which a military operation will begin.

23.   Doctors are waiting for their health to improve so the complex separation operation can begin.

24.   Domestic opposition to the NATO bombing campaign in the former Yugoslavia was high as the operation began Wednesday, with opponents raising a wide range of objections.

25.   Five and a half hours after Jarrett entered the hospital, his operation begins.

26.   For two weeks after the operation began, the government refused to explain or even acknowledge it.

27.   For the last two weeks, as the planes have dropped their bombs on Afghanistan, the troops at Fort Bragg have waited for ground operations to begin.

28.   He said operations might begin again as soon as Tuesday.

29.   He said the scalloping operation would begin in a corner of the area where the heaviest concentration of debris was found.

30.   He was one of four sailors whose bodies have been retrieved since recovery operations began on Saturday.