astronaut to do so. Over one-third of all of NASA's crewed space missions have had at least one Purdue graduate as a crew member. In science, Purdue has also produced Nobel Prize–winning physicists in Edward Mills Purcell and Ben Roy Mottelson, as well as Nobel Prize–winning chemist Akira Suzuki. Other noted Purdue alumni in science include pioneer of robotics and remote control technology Thomas B. Sheridan; Debian founder Ian Murdock; Chinese physicist Deng Jiaxian, a founding father and key contributor to the Chinese nuclear weapon programs; mathematician Yitang Zhang; chemist Lawrence Rocks; biochemist Edwin T. Mertz, credited with the discovery of high-protein corn and beans; Indian chemist CNR Rao, who has been awarded the Bharat Ratna, the highest civilian award in India; engineer Mohamed Atalla who invented the MOS transistor; physical organic chemist and advocate for women and minorities in science Nina Roscher, who received the ACS Award for Encouraging Women into Careers in the Chemical Sciences (1996) and the Presidential Award for Excellence in Science, Mathematics and Engineering Mentoring (1998); and Professor Reuben J. Olembo, a geneticist and environmentalist who went on to become the deputy executive director of UNEP and a UN Assistant Secretary-General, and who was recognised by Purdue in 1994 with a Distinguished Alumni Award for Agriculture. In business and economics, Purdue alumni include Stephen Bechtel, Jr., owner of Bechtel Corporation; Federal Reserve Bank president Jeffrey Lacker; and popcorn specialist Orville Redenbacher. In 2010, Bloomberg also revealed Purdue was one of the universities in America with the most undergraduate alumni serving as chief executive officers of S&P 500 firms. They are Gregory Wasson, president/CEO of Walgreens; Mark Miller, chairman/president/CEO of Stericycle; Charles Davidson, former chairman/CEO of Noble Energy; Samuel Allen, chairman /president/CEO of Deere & Company; Don Thompson, president/COO of McDonald's; and John C. Martin (businessman), chairman/CEO of Gilead Sciences, Inc. In government and culture, Purdue alumni include Pulitzer Prize–winners Booth Tarkington and John T. McCutcheon, as well as Ginger Thompson, former New York Times reporter currently with ProPublica; Akinwumi Adesina, former Nigerian minister of Agriculture and Rural development and current President of the African Development Bank; Essam Sharaf, former Egyptian Prime Minister; Tom Moore, theater and television director; James Thomson, CEO of Rand Corporation; Brian Lamb, founder and CEO of C-SPAN; Harry G. Leslie, former Governor of Indiana; Kirk Fordice, former Governor of Mississippi; Earl Butz, former United States Secretary of Agriculture; Birch Bayh, former