One way or another, a small number of Seal Team 6/DEVGRU operations were made public.

Grenada in 1983, on St Ronnie's watch.

Somalia in 1992/1993, on Clinton's watch

Bosnia, from 1992 to 1995, also on Clinton's watch

Afghanistan, from 2001, on the bush boy's turn.

Abbottabad, in 2011 under Obama

Helicopter crash in Afghanistan in August of 2011 killed 15 team members, on Obama's watch

Somali pirate hostage rescue in January of 2012, under Obama.

http://en.wikipedia.org/wiki/United_States_Naval_Special_Warfare_Development_Group