TL;DR version:

Somali pirates took over as a U.S. cargo ship carrying relief food for people in Kenya. 20 members of the crew overpowered the pirates and took the ship back. The captain of the ship voluntarily left with the pirates to keep his crew safe.

Now the pirates are in the ocean on a speedboat with the captain. The U.S. navy has a warship nearby and more ships coming to the aid. How stupid can you be? You're sitting in a speedboat and you have a dozen or so ships from one of the most powerful naval forces in the world coming after you. Sheer brilliance.

http://news.yahoo.com/s/ap/20090409/ap_on_re_af/piracy