Bill Gates away half of its value, as detailed in "The Power of Half". Gates and his wife invited Joan Salwen to Seattle to speak about what the family had done, and on December 9, 2010, Bill and Melinda Gates, and investor Warren Buffett signed a commitment they called the "Giving Pledge." The pledge is a commitment by all three to donate at least half of their wealth over the course of time to charity. Gates has also provided personal donations to educational institutions. In 1999, Gates donated $20 million to the Massachusetts Institute of Technology (MIT) for the construction of a
USS Thomas S. Gates Panama, during which she made two major drug seizures (4.5 tons of cocaine) from "Go-Fast" speedboats off El Salvador. The warship also conducted a special forces exercise called Trident Warrior and a submarine tracking and gunnery exercise with the Peruvian Navy. In March 2003, "Thomas S. Gates" was homeported at Pascagoula and was assigned to Destroyer Squadron 6. On 21 March 2004, "Thomas S. Gates" rendezvoused with cruise ship "Celebrity Summit", of Royal Caribbean International Cruise Lines, in the central Caribbean. The cruiser's embarked USCG Enforcement Detachment boarding team, with the cooperation of the cruise ship's captain and security force,