Pirates anchor hijacked supertanker Sirius Star off Somalia coast | World news | guardian.co.uk: "The Saudi Arabia-owned supertanker hijacked by Somali pirates in a raid several hundred miles out to sea is understood to have anchored off the coast of Somalia."
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Fascinating example of private navies wreaking havoc. What to do? How about privatizing the response? It's right in the constitution: letters of marque and reprisal: Article I, Section 8: Congress has the power "To...grant Letters of Marque and Reprisal, and make Rules concerning Captures on Land and Water;"

That means commissioning privateers to go get the scalawags and keep a portion of what they recover as their booty. I think you would get plenty of well-armed and well-trained volunteers, especially in this economy. Maybe a team of ex-SAS and Special Forces lads in a fast boat with a few Zodiacs and the proper hardware?