WASHINGTON - (AP) - The Senate is headed for a key test vote on abill that would provide up $6.2 billion to aid people who becamesick after being exposed to toxins at the World Trade Center ruins.

Bill supporters say they're confident they have the 60 votesneeded to prevail on the vote expected Wednesday. But they worrythat Republicans who oppose the measure could try to stall a finalvote as the holidays near and Congress' lame duck session windsdown.

The bill would provide medical and economic benefits over 10years to survivors and responders to the Sept. 11, 2001, attacks.

It also would have to be approved by the House. New Yorklawmakers are pressing the House to remain in session for the vote.