Microsoft founder Bill Gates waits in the basement of the Rayburn House Office Building on Capitol Hill in Washington., U.S., March 29, 2023. REUTERS/Julia Nikhinson 

Microsoft founder Bill Gates waits in the basement of the Rayburn House Office Building on Capitol Hill in Washington., U.S., March 29, 2023. REUTERS/Julia Nikhinson 

Microsoft founder Bill Gates waits in the basement of the Rayburn House Office Building on Capitol Hill in Washington., U.S., March 29, 2023. REUTERS/Julia Nikhinson 

Microsoft founder Bill Gates rides an escalator on Capitol Hill in Washington., U.S., March 29, 2023. REUTERS/Julia Nikhinson TPX IMAGES OF THE DAY 

Microsoft founder Bill Gates rides an elevator on Capitol Hill in Washington., U.S., March 29, 2023. REUTERS/Julia Nikhinson 

Britain's Prime Minister Rishi Sunak reacts during a visit with Microsoft founder Bill Gates at Imperial College University, in London, Britain, February 15, 2023. Justin Tallis//Pool via REUTERS 

Britain's Prime Minister Rishi Sunak and Microsoft founder Bill Gates react as they speak during a visit of the Imperial College University,, in London, Britain, February 15, 2023. Justin Tallis//Pool via REUTERS 

Britain's Prime Minister Rishi Sunak reacts during a visit with Microsoft founder Bill Gates at Imperial College University, in London, Britain, February 15, 2023. Justin Tallis//Pool via REUTERS 

Britain's Prime Minister Rishi Sunak and Microsoft founder Bill Gates react as they speak during a visit of the Imperial College University,, in London, Britain, February 15, 2023. Justin Tallis//Pool via REUTERS 

Microsoft founder Bill Gates reacts during a visit with Britain's Prime Minister Rishi Sunak of the Imperial College University, in London, Britain, February 15, 2023. Justin Tallis//Pool via REUTERS 

Microsoft founder Bill Gates reacts during a visit with Britain's Prime Minister Rishi Sunak of the Imperial College University, in London, Britain, February 15, 2023. Justin Tallis//Pool via REUTERS 

Microsoft founder Bill Gates reacts during a visit with Britain's Prime Minister Rishi Sunak of the Imperial College University, in London, Britain, February 15, 2023. Justin Tallis//Pool via REUTERS 

Britain's Prime Minister Rishi Sunak and Microsoft founder Bill Gates speak with members of R-Leaf, parts of Crop Intellect, that is creating a technology aiming to turn air pollution into plant food, during a visit of the Imperial College University, in London, Britain, February 15, 2023. Justin Tallis//Pool via REUTERS 

Britain's Prime Minister Rishi Sunak and Microsoft founder Bill Gates speak with members of R-Leaf, parts of Crop Intellect, that is creating a technology aiming to turn air pollution into plant food, during a visit of the Imperial College University, in London, Britain, February 15, 2023. Justin Tallis//Pool via REUTERS 

Britain's Prime Minister Rishi Sunak and Microsoft founder Bill Gates speak with members of Econic, a startup developing technologies that enable the use of captured CO2 to make low-cost and sustainable plastics, during a visit of the Imperial College University, in London, Britain, February 15, 2023. Justin Tallis//Pool via REUTERS 

Britain's Prime Minister Rishi Sunak and Microsoft founder Bill Gates speak with members of Econic, a startup developing technologies that enable the use of captured CO2 to make low-cost and sustainable plastics, during a visit of the Imperial College University, in London, Britain, February 15, 2023. Justin Tallis//Pool via REUTERS 

Britain's Prime Minister Rishi Sunak and Microsoft founder Bill Gates speak with members of H2GO Power, a company aiming at developing technologies to change how hydrogen is stored and managed, during a visit of the Imperial College University, in London, Britain, February 15, 2023. Justin Tallis//Pool via REUTERS 

Britain's Prime Minister Rishi Sunak and Microsoft founder Bill Gates speak with members of H2GO Power, a company aiming at developing technologies to change how hydrogen is stored and managed, during a visit of the Imperial College University, in London, Britain, February 15, 2023. Justin Tallis//Pool via REUTERS 

Britain's Prime Minister Rishi Sunak and Microsoft founder Bill Gates speak with a member of H2GO Power, a company aiming at developing technologies to change how hydrogen is stored and managed, during a visit of the Imperial College University, in London, Britain, February 15, 2023. Justin Tallis//Pool via REUTERS 

Britain's Prime Minister Rishi Sunak and Microsoft founder Bill Gates react as they speak with members of H2GO Power, a company aiming at developing technologies to change how hydrogen is stored and managed, during a visit of the Imperial College University, in London, Britain, February 15, 2023. Justin Tallis//Pool via REUTERS 

Tennis - Australian Open - Men's Singles Final - Melbourne Park, Melbourne, Australia - January 29, 2023 Bill Gates is pictured in the stands ahead of the final match between Serbia's Novak Djokovic and Greece's Stefanos Tsitsipas REUTERS/Jaimi Joy 

Tennis - Australian Open - Men's Singles Final - Melbourne Park, Melbourne, Australia - January 29, 2023 Bill Gates is pictured in the stands ahead of the final match between Serbia's Novak Djokovic and Greece's Stefanos Tsitsipas REUTERS/Hannah Mckay 

Tennis - Australian Open - Melbourne Park, Melbourne, Australia - January 27, 2023 Bill Gates is pictured in the stands during the semi final match between Serbia’s Novak Djokovic and Tommy Paul of the U.S. REUTERS/Loren Elliott 

Tennis - Australian Open - Melbourne Park, Melbourne, Australia - January 27, 2023 Bill Gates is pictured in the stands during the semi final match between Serbia’s Novak Djokovic and Tommy Paul of the U.S. REUTERS/Loren Elliott 

Tennis - Australian Open - Melbourne Park, Melbourne, Australia - January 27, 2023 Bill Gates watches the semi final match between Russia's Karen Khachanov and Greece’s Stefanos Tsitsipas REUTERS/Jaimi Joy 

Tennis - Australian Open - Melbourne Park, Melbourne, Australia - January 26, 2023 Bill Gates and his sister Kristianne Gates are pictured in the stands during the semi final match between Belarus’ Victoria Azarenka and Kazakhstan’s Elena Rybakina 

Tennis - Australian Open - Melbourne Park, Melbourne, Australia - January 26, 2023 Bill Gates and his sister Kristianne Gates are pictured in the stands during the semi final match between Belarus’ Victoria Azarenka and Kazakhstan’s Elena Rybakina REUTERS/Jaimi Joy 

Tennis - Australian Open - Melbourne Park, Melbourne, Australia - January 26, 2023 Bill Gates and his sister Kristianne Gates are pictured in the stands during the semi final match between Belarus’ Victoria Azarenka and Kazakhstan’s Elena Rybakina REUTERS/Jaimi Joy 

Tennis - Australian Open - Melbourne Park, Melbourne, Australia - January 26, 2023 Bill Gates and his sister Kristianne Gates are pictured in the stands during the semi final match between Belarus’ Victoria Azarenka and Kazakhstan’s Elena Rybakina REUTERS/Carl Recine 

Tennis - Australian Open - Melbourne Park, Melbourne, Australia - January 26, 2023 Bill Gates and his sister Kristianne Gates are pictured in the stands during the semi final match between Belarus’ Victoria Azarenka and Kazakhstan’s Elena Rybakina REUTERS/Carl Recine 

Tennis - Australian Open - Melbourne Park, Melbourne, Australia - January 26, 2023 Bill Gates and his sister Kristianne Gates are pictured in the stands during the semi final match between Belarus’ Victoria Azarenka and Kazakhstan’s Elena Rybakina REUTERS/Carl Recine 

Tennis - Australian Open - Melbourne Park, Melbourne, Australia - January 26, 2023 Bill Gates and his sister Kristianne Gates are pictured in the stands during the semi final match between Belarus’ Victoria Azarenka and Kazakhstan’s Elena Rybakina REUTERS/Carl Recine 

Bill Gates, Chairman of the Maricopa County Board of Supervisors, speaks to the media at the Maricopa County Tabulation and Election Center in Phoenix, Arizona, U.S., November 11, 2022. REUTERS/Jim Urquhart 

Bill Gates, Chairman of the Maricopa County Board of Supervisors, speaks to the media at the Maricopa County Tabulation and Election Center in Phoenix, Arizona, U.S., November 11, 2022. REUTERS/Jim Urquhart 

Bill Gates, Chairman of the Maricopa County Board of Supervisors, speaks to the media at the Maricopa County Tabulation and Election Center in Phoenix, Arizona, U.S., November 11, 2022. REUTERS/Jim Urquhart 

Bill Gates, Chairman of the Maricopa County Board of Supervisors, speaks to the media at the Maricopa County Tabulation and Election Center in Phoenix, Arizona, U.S., November 11, 2022. REUTERS/Jim Urquhart 

Bill Gates, Chairman of the Maricopa County Board of Supervisors, speaks to the media at the Maricopa County Tabulation and Election Center in Phoenix, Arizona, U.S., November 10, 2022. REUTERS/Jim Urquhart 

Bill Gates, Chairman of the Maricopa County Board of Supervisors, speaks to the media at the Maricopa County Tabulation and Election Center in Phoenix, Arizona, U.S., November 10, 2022. REUTERS/Jim Urquhart 

Bill Gates, Chairman of the Maricopa County Board of Supervisors, speaks to the media at the Maricopa County Tabulation and Election Center in Phoenix, Arizona, U.S., November 10, 2022. REUTERS/Jim Urquhart 

Bill Gates, Chairman of the Maricopa County Board of Supervisors, speaks to the media at the Maricopa County Tabulation and Election Center in Phoenix, Arizona, U.S., November 10, 2022. REUTERS/Jim Urquhart 

Bill Gates, Chairman of the Maricopa County Board of Supervisors, speaks to the media at the Maricopa County Tabulation and Election Center in Phoenix, Arizona, U.S., November 10, 2022. REUTERS/Jim Urquhart 

Chief Executive Officer (CEO) of the Bill & Melinda Gates Foundation, Mark Suzman, speaks during an interview with Reuters at the COP27 climate summit in Egypt's Red Sea resort of Sharm el-Sheikh, Egypt, November 7, 2022. REUTERS/Emilie Madi 

Chief Executive Officer (CEO) of the Bill & Melinda Gates Foundation, Mark Suzman, speaks during an interview with Reuters at the COP27 climate summit in Egypt's Red Sea resort of Sharm el-Sheikh, Egypt, November 7, 2022. REUTERS/Emilie Madi 

Chief Executive Officer (CEO) of the Bill & Melinda Gates Foundation, Mark Suzman, speaks during an interview with Reuters at the COP27 climate summit in Egypt's Red Sea resort of Sharm el-Sheikh, Egypt, November 7, 2022. REUTERS/Emilie Madi 

Chief Executive Officer (CEO) of the Bill & Melinda Gates Foundation, Mark Suzman, speaks during an interview with Reuters at the COP27 climate summit in Egypt's Red Sea resort of Sharm el-Sheikh, Egypt, November 7, 2022. REUTERS/Emilie Madi 

Tennis - Laver Cup - 02 Arena, London, Britain - September 23, 2022 Bill Gates looks on in the stands during Team Europe's Andy Murray's match against Team World's Alex de Minaur Action Images via Reuters/Andrew Boyers 

Former U.S. Secretary of State Hillary Clinton, Prof. Agnes Binagwaho Vice Chancellor of the University of Global Health Equity, and Melinda French Gates, Co-Chair of Bill & Melinda Gates Foundation and Founder of Pivotal Ventures, speak on a panel during the Clinton Global Initiative (CGI) meeting in Manhattan, New York City, U.S., September 19, 2022. REUTERS/David 'Dee' Delgado 

Melinda French Gates, Co-Chair of Bill & Melinda Gates Foundation and Founder of Pivotal Ventures, speaks during the Clinton Global Initiative (CGI) meeting in Manhattan, New York City, U.S., September 19, 2022. REUTERS/David 'Dee' Delgado 

Microsoft Corp co-founder Bill Gates delivers his speech at the National Assembly in Seoul, South Korea, August 16, 2022. REUTERS/Kim Hong-Ji/Pool 

Microsoft Corp co-founder Bill Gates delivers his speech at the National Assembly in Seoul, South Korea, August 16, 2022. REUTERS/Kim Hong-Ji/Pool 

Microsoft Corp co-founder Bill Gates leaves after delivering his speech at the National Assembly in Seoul, South Korea, August 16, 2022. REUTERS/Kim Hong-Ji/Pool 

Microsoft Corp co-founder Bill Gates leaves after delivering his speech at the National Assembly in Seoul, South Korea, August 16, 2022. REUTERS/Kim Hong-Ji/Pool 

Microsoft Corp co-founder Bill Gates shakes hands with South Korea's National Assembly Speaker Kim Jin-pyo during their meeting at the National Assembly in Seoul, South Korea, August 16, 2022. REUTERS/Kim Hong-Ji/Pool 

Microsoft Corp co-founder Bill Gates is greeted by South Korea's National Assembly Speaker Kim Jin-pyo before their meeting at the National Assembly in Seoul, South Korea, August 16, 2022. REUTERS/Kim Hong-Ji/Pool 

Microsoft Corp co-founder Bill Gates talks with South Korea's National Assembly Speaker Kim Jin-pyo during their meeting at the National Assembly in Seoul, South Korea, August 16, 2022. REUTERS/Kim Hong-Ji/Pool 

Microsoft Corp co-founder Bill Gates attends a meeting with South Korea's National Assembly Speaker Kim Jin-pyo at the National Assembly in Seoul, South Korea, August 16, 2022. REUTERS/Kim Hong-Ji/Pool 

Bill Gates attends the annual Allen and Co. Sun Valley Media Conference in Sun Valley, Idaho, U.S., July 8, 2022. REUTERS/Brendan McDermid 

Bill Gates attends the annual Allen and Co. Sun Valley Media Conference in Sun Valley, Idaho, U.S., July 8, 2022. REUTERS/Brendan McDermid 

Bill Gates attends the annual Allen and Co. Sun Valley Media Conference in Sun Valley, Idaho, U.S., July 8, 2022. REUTERS/Brendan McDermid 

Bill Gates attends the annual Allen and Co. Sun Valley Media Conference in Sun Valley, Idaho, U.S., July 8, 2022. REUTERS/Brendan McDermid