and a group with Kerry's PCF-94 boat went around to the right, along the shoreline. A mine was detonated directly beneath the lead boat, PCF-3, as it crossed the weir to the left, lifting PCF-3 "about 2–3 ft out of water". James Rassmann, a Green Beret advisor who was aboard Kerry's PCF-94, was knocked overboard when, according to witnesses and the documentation of the event, a mine or rocket exploded close to the boat. According to the documentation for the event, Kerry's arm was injured when he was thrown against a bulkhead during the explosion. PCF 94 returned to the scene and Kerry rescued Rassmann who was receiving sniper fire from the water. Kerry received the Bronze Star Medal with Combat "V" for "heroic achievement", for his actions during this incident; he also received his third Purple Heart. Return from Vietnam After Kerry's third qualifying wound, he was entitled per Navy regulations to reassignment away from combat duties. Kerry's preferred choice for reassignment was as a military aide in Boston, New York City or Washington, D.C. On April 11, 1969, he reported to the Brooklyn-based Atlantic Military Sea Transportation Service, where he would remain on active duty for the following year as a personal aide to an officer, Rear Admiral Walter Schlech. On January 1, 1970, Kerry was temporarily promoted to full lieutenant. Kerry had agreed to an extension of his active duty obligation from December 1969 to August 1970 in order to perform Swift Boat duty. John Kerry was on active duty in the United States Navy from August 1966 until January 1970. He continued to serve in the Naval Reserve until February 1978. "Swiftboating" controversy With the continuing controversy that had surrounded the military service of George W. Bush since the 2000 presidential election (when he was accused of having used his father's political influence to gain entrance to the Texas Air National Guard, thereby protecting himself from conscription into the United States Army, and possible service in the Vietnam War), John Kerry's contrasting status as a decorated Vietnam War veteran posed a problem for Bush's re-election campaign, which Republicans sought to counter by calling Kerry's war record into question. As the presidential campaign of 2004 developed, approximately 250 members of a group called Swift Boat Veterans for Truth (SBVT, later renamed Swift Vets and POWs for Truth) opposed Kerry's campaign. The group held press conferences, ran ads