Navy Irregular Warfare and Counterterrorism Operations: Background and Issues for Congress [June 2, 2017] [open pdf - 2MB]
"In the years following the terrorist attacks of September 11, 2001, the Navy has carried out a variety of irregular warfare (IW) and counterterrorism (CT) activities. Among the most readily visible of these were operations carried out by Navy sailors serving ashore in the Middle East and Afghanistan, and the May 1-2, 2011, U.S. military operation in Abbottabad, Pakistan, that killed Osama bin Laden [...] The Navy's current IW and CT activities pose a number of potential oversight issues for Congress, including how much emphasis to place on IW and CT activities in Navy budgets, particularly in a context of constraints on Navy budgets and Navy desires to devote resources to developing 'high end' combat capabilities for countering improved conventional military capabilities of countries such as China and Russia."
CRS Report for Congress, RS22373
Federation of American Scientists: http://www.fas.org/sgp/crs/index.html