Congresscritters with gas masks

[Declan McCullagh]

Roll Call is one of the two major papers (along with the Hill) covering 
Capitol Hill... --Declan

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http://www.rollcall.com/pages/news/00/2001/09/news0924b.html

Protective masks for every House Member and floor staffer were placed in an 
area readily accessible to lawmakers in the Capitol roughly a year ago to 
guard against a chemical or germ warfare assault, according to senior House 
staffers.
"There were plenty of meetings where this was discussed and it was put in 
place," a knowledgeable House GOP aide said.
Another House staffer added that masks are available in multiple places 
within the Capitol building.