Safe to say that the Department of Defense does not have a submersible with arms to shut off the valve of a deep-water oil well.

WHITEHOUSE: Aboard Air Force One En Route Andrews Air Force Base

That starts off with a "junk shot, " in which material such as rubber tires and golf balls is pumped into the shut-off valve, or blowout preventer, that sits atop the well.

WSJ: Spill Fight Shows Progress