The Power of Half its Sunday collections to a local charity. Baumberger remarked: "What will we learn by practicing the power of half? What will this program teach our children and youth? I cannot wait to find out." Melinda Gates, wife of Microsoft founder Bill Gates, said she was inspired by the Salwens' philanthropic efforts. On December 9, 2010, Bill Gates, Mark Zuckerberg (Facebook's CEO), and investor Warren Buffett signed a promise they called the "Gates-Buffet Giving Pledge", in which they promised to donate to charity at least half of their wealth. After launching the Giving Pledge, the Gates invited the Salwens to Seattle
Bill Gates Sr. (b. 1929), whom he met at UW, and they remained married until she died in 1994. They had three children: Kristianne, Bill, and Libby. In 1996 Gates married Mimi Gardner Gates (b.1943), who was the director of the Seattle Art Museum. William H. Gates Sr. serves as an Honorary Co-Chair for the World Justice Project. The World Justice Project works to lead a global, multidisciplinary effort to strengthen the Rule of Law for the development of communities of opportunity and equity . Bill Gates Sr. William Henry Gates II (born November 30, 1925), better known as Bill Gates Sr., is