 Complete the following phrase:  The 304th trained for combat search and rescue CSAR capability from its inception. The 304th was activated in the Reserves on 16 November 1957 at Portland IAP. In 1961, Pararescuemen PJs were added to the unit. Since then, the 304th has been training, equipping and employing Combat Rescue Officers, PJs, and support personnel worldwide in support of U.S. national security interests. It performed search, rescue, and medical evacuation missions primarily in the Northwestern United States, including over 100 missions immediately following the Mount St. Helens 