Since it hasn't been mentioned here...
http://www.cnn.com/2012/01/25/world/africa/somalia-aid-workers/index.html?hpt=hp_t2
US probably undertook the job because one was a US citizen, but the Danes were fine with it.
Jessica Buchanan, 32, and Poul Thisted, 60, had been held since October 25, when they were abducted in Galkayo, central Somalia, after they visited humanitarian projects, said the Danish Refugee Council, the agency for which they worked.
Old-fashioned stuff that the US has always been good at. Parachute at night from high altitude, attack without warning, kill the bad guys, rescue hostages unharmed, leave.
Apparently the kidnappers had turned down a $1m ransom, God knows what they actually wanted.
I'm a little disappointed by the governments, though. Yes, aid workers go at their own risk, but all things considered, you would have thought that the governments wouldn't be waiting months to go in and get their own people back.
NTM