21.   The plane lost altitude and there was a second explosion which broke the plane into pieces, investigators have said.

22.   The second explosion occurred while firefighters were at the plant.

23.   Then a few seconds later the second explosion occurred.

24.   Then the second explosion ripped through, covering him with plaster.

25.   Then came the second explosion, and Reaves suddenly saw fire all around outside.

26.   There was a second explosion, of the boilers.

27.   There was also a second explosion, either a smaller bomb or perhaps the gasoline tank of a parked car nearby, American officials said.

28.   There was also a second explosion, caused either a smaller bomb or the gasoline tank of a parked car nearby, U.S. officials said.

29.   Then, a second explosion of unknown origin ripped through the mine, trapping the would-be rescuers.

30.   Twenty minutes later, a second explosion went off nearby.