<p>WASHINGTON (AP) - The government miscalculated the number of U.S. troops who may have been exposed to nerve gases when Iraqi weapons were destroyed during the first Gulf War, congressional investigators say.</p>
<p>The General Accounting Office was expected to testify in a House hearing Monday that the Pentagon and CIA used a flawed computer model to estimate the fallout from the weapons. The models were created with inaccurate data, and the height of the plume resulting from the 1991 weapons explosions was underestimated, according to a memo sent to members of a House Government Reform subcommittee.</p>