Video
New anthrax victim 'gravely ill'
More than 2,000 employees at the Brentwood mail centre in Washington, where the sick man works, and 150 at a mail centre near Baltimore-Washington International Airport where he also worked, are being tested and given treatment. The BBC's Hilary Andersson reports.

Related News:
Video
The BBC's Jonny Dymond in Washington: "Over two thousand postal workers are going to be tested"