An inspector with Washington Gas finds a basement furnace to be the source of a carbon monoxide leak that sent three persons to the hospital, one in critical condition, for carbon monoxide poisoning at 1721 P St. N.W., Washington, D.C., Thursday, Jan. 26, 2012. A friend of the owner on the scene said that the furnace had recently been worked on. (Andrew Harnik/The Washington Times)
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