Oh wait, it’s just the United States Navy: The Free Lance–Star:
Before a Norfolk-based Navy squadron heads to Iraq, it will be training for combat on the Rappahannock River.
Navy Lt. Michael Quaresimo, a training officer with Little Creek Naval Amphibious Base, said a 12-person team will conduct exercises on the river Tuesday through Thursday.
Quaresimo said training would occur within 21/2 miles east and west of the Port Royal bridge on U.S. 301, as well as at Fort A.P. Hill in Caroline County.
[…]
He encouraged people boating on the river not to approach the Navy gunboats, for safety reasons.
Yeah, I would recommend staying away from the *cough*SEALs*cough*.
UPDATE: For those doubting my SEAL conclusion, according to Wikipedia:
Naval Amphibious Base Little Creek, a naval base in Virginia Beach, Virginia, is home to SEAL Teams 2, 4, 8 and 10.