The U.S. Navy has issued its first security policy* for protection of "biological select agents and toxins" (BSAT) at Navy facilities, a move that may signify heightened Navy interest in research involving these lethal materials.
Select agents are substances designated by the Department of Health and Human Services and the Department of Agriculture that "present a high bioterrorism risk to national security and have the greatest potential for adverse public health impact with mass casualties of humans and/or animals or that pose a severe threat to plant health or to plant products." A few dozen particular biological agents and toxins have been so designated (including ebola and smallpox viruses, botulinum, etc.
There are currently two Navy facilities in the United States that have possession of select agents and toxins...
"The Navy may increase the number of facilities in the future, and other Navy facilities may gain access or possession of BSAT due to non-routine events," the document states.
*http://www.fas.org/irp/doddir/navy/opnavinst/5530_16.pdf | Secrecy News
~It's those 'non-routine events' we have to worry about.
I'm almost certain the US Army has its own stockpile of biological weapons, but I wonder if the US Air Force finds it's necessary to likewise maintain BSAT storage facilities?
I'm guessing that the US Marines rely on the Navy for bioweapon procurement while the US Coast Guard hasn't yet been able to convince the Navy brass of their need for their own BSAT cache.