41.   Carbon monoxide kills by crowding oxygen molecules out of the bloodstream.

42.   Caputo said he had first thought of killing himself by running in front of a train, track security director Bill Knowles said.

43.   Cedeno was the fourth man shot and killed by police this year in confrontations that were said to involve civilians armed with knives.

44.   Cedeno was the fourth man shot and killed by police this year in confrontations in which officers were said to have defended themselves against knife-holders.

45.   Cholera, which kills by severe dehydration, is spread through contaminated water.

46.   Cholera, which kills by severe dehydration, is spread through unsanitary water.

47.   Defense attorneys say the brothers were driven to kill by years of emotional, sexual and physical abuse.

48.   Disease, pollutants, killing by sharks and fishermen and entrapment in fishing gear are suspected in the decline.

49.   Earlier in the day, Serbs held a demonstration here to highlight their fears over the looting and killing by ethnic Albanians.

50.   Ebola is a member of the hemorrhagic fever virus group that produce flu-like symptoms and fever and that kill by causing uncontrollable bleeding throughout the body.