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 the Gulf of Aqaba. Following an in-port period at Jeddah (2–10 March), where she underwent an IMAV alongside the destroyer tender , "Thomas S. Gates" transited the Suez Canal (12 March). She then conducted anti submarine warfare exercises in the central Mediterranean (15–17 March), after which she transited the Strait of Gibraltar (18 March), headed for Norfolk, returning to her homeport on 28 March. "Thomas S. Gates" fourth major deployment was from 6 May to 6 Nov 1992. "Thomas S. Gates", with HSL-44 Detachment 9 embarked, deployed (Med 2-92) in company with guided missile cruiser and destroyer on 6 May