Scientists recently discovered a new type of botulinum toxin (a.k.a. botox) that they believe is the deadliest substance known to man. Because they've yet to discover an antitoxin, researchers won't publish the details of gene sequence due to security concerns—a first for the scientific community. Thank God.
It's probably nothing, but Utah's Dugway Proving Ground — where the Army tests biological weapon defense systems — is on lockdown and no one can leave. "We are working [...] to resolve a serious concern within the Test Area." (Updated)