They feared use of the smallpox virus as a bioweapon.    From Wordnet, Princeton University. 

The bioweapon is in the post.    From Wordnik.com.  [King David's descendants; Science news releases] Reference

Is this an almost made to order bioweapon or what?.    From Wordnik.com.  [Stern outtakes! « BuzzMachine] Reference

Swine flu is a bioweapon developed to kill Barack Obama.    From Wordnik.com.  [Johann Hari: Conspiracy Theories Drain Our Political Energy -- and Lead Nowhere] Reference

Who has the technology to develop and disseminate plague as a bioweapon?.    From Wordnik.com.  [OpEdNews - Quicklink: Bubonic Plague kills 40 al-Qaeda operatives] Reference

No bioweapon aimed at the lactose intolerant need be feared by the Basques!.    From Wordnik.com.  [The Volokh Conspiracy » More Interesting DNA Information] Reference

This is attested to by the deputy director of the Soviet bioweapon program.    From Wordnik.com.  [Magic and Mayhem] Reference

Died: William Patrick, 84, bioweapon pioneer who turned to defending against them.    From Wordnik.com.  [What's News: World-Wide] Reference

The Council of Foriegn Relations says about the availability of smallpox as a bioweapon.    From Wordnik.com.  [THE NEWS BLOG] Reference

Won a news Emmy for a "60 Minutes '" segment on smallpox virus as a potential bioweapon.    From Wordnik.com.  [CNN Transcript Oct 11, 2001] Reference

The mythological bioweapon labs on wheels and rails portion of the speech is just priceless.    From Wordnik.com.  [We just don't get it] Reference

An elite military unit has to grapple with codes and ciphers to find an antidote to a bioweapon.    From Wordnik.com.  [2009 August 13 « One-Minute Book Reviews] Reference

Other people would say, you know what, I'm nervous about smallpox being used as a bioweapon soon.    From Wordnik.com.  [CNN Transcript Dec 15, 2002] Reference

Making a bioweapon requires more than just finding a disease thats suitably lethal and contagious.    From Wordnik.com.  [Terminator: Biological Warfare] Reference

We actually had a bioweapon test here in May of 2000 as part of a national multi-site disaster drill.    From Wordnik.com.  [CNN Transcript Oct 12, 2001] Reference

COHEN: And if Saddam Hussein or anyone else uses smallpox as a bioweapon, the results could be devastating.    From Wordnik.com.  [CNN Transcript Jan 25, 2003] Reference

Obviously, Romulan intelligence must have heard that the Federation had developed a bioweapon against them.    From Wordnik.com.  [Bloodthirst] Reference

The Martians decimate the Fourth Men, who counterattack with a bioweapon causing a thousand-year-long plague.    From Wordnik.com.  [17 Must-Have Science Fiction Books - a 1949 Perspective] Reference

Why should I get a dangerous vaccine for a disease that doesn't exist, and may not ever be used as a bioweapon.    From Wordnik.com.  [CNN Transcript Dec 13, 2002] Reference

A gigantic petri dish where the toxic sludge of former civilizations mutates existing viruses into a bioweapon?.    From Wordnik.com.  [Archive 2007-09-01] Reference

Jonas is willing to put down his bioweapon, but he wants something in return, and you're about to find out what.    From Wordnik.com.  [Pay attention: '24' is ticking again, and this one's a blast] Reference

DEFENSE SECRETARY William Cohen's plan to vaccinate all U.S. troops against the bioweapon anthrax has hit a snag.    From Wordnik.com.  [Anthrax Snafu] Reference

Their origin would make a lot more sense if the Atomic Crud was some sort of bioweapon instead of radiation sickness.    From Wordnik.com.  [Lame-ass villains #15 - The Nuclear Family] Reference

However, the Soviet Union's Biopreparat organization turned Black Death from a medieval plague into a 20th Century bioweapon.    From Wordnik.com.  [War on Iran = You Die from Biowar] Reference

If you want to make half the world sick, set a bioweapon-grade viral pathogen loose at a major airport anywhere in the world.    From Wordnik.com.  [A Journal of the Plague Years] Reference

And they -- the World Health Organization estimates that if someone were to use it as a bioweapon it could be truly devastating.    From Wordnik.com.  [CNN Transcript Jan 15, 2003] Reference

Edit an extraordinarily sophisticated bioweapon, a virus made from scratch that has never existed before, it targets brain cells.    From Wordnik.com.  [Prof. Steve Steve Costume Contest - The Panda's Thumb] Reference

This action-packed relevant thriller works because Kyle Mills insures the bioweapon employed by the terrorists seems feasible to develop.    From Wordnik.com.  [Darkness Falls-Kyle Mills « The Merry Genre Go Round Reviews] Reference

Not likely, scoff the anonymous intelligence sources, who say they can find no evidence that Saddam can create a bioweapon out of smallpox.    From Wordnik.com.  [Shadow Struggle] Reference

The lentivirus used to test a communicable bioweapon.    From Wordnik.com.  [WHAT REALLY HAPPENED] Reference

Botox might turn out to be the next bioweapon of mass destruction.    From Wordnik.com.  [Gaea Times (by Simple Thoughts) Breaking News and incisive views 24/7] Reference

Baxter's lab in the Ukraine was in fact preparing a bioweapon disguised as a vaccine.    From Wordnik.com.  [Alex Jones' Prison Planet.com] Reference

Just about the only way a jihadist could deploy a real bioweapon would be if someone were kind enough to make it for them.    From Wordnik.com.  [ScienceBlogs Channel : Life Science] Reference