41.   They planned to announce final approval Sunday of their plan to fill the nine-story building with bacteria-killing chlorine dioxide gas.

42.   Trace amounts of anthrax were found in a Senate office building that had been fumigated with chlorine dioxide gas two weeks ago in an attempt to kill lingering spores.

43.   Toxic chlorine gas leaked from a water purification plant in northwestern Japan on Friday, forcing dozens of people to evacuate their homes, police said.

44.   Twenty died from suffocation Wednesday after chlorine gas spilled from a damaged cylinder aboard a truck bound for a chemicals company.

45.   Police said the incident occurred after two chemicals became mixed together during swimming pool maintenance and chlorine gas was released.

46.   The fumes of the chlorine gas lingered in the air until late Thursday after the leakage from two drums on a truck headed to a chemicals company.