Travis Air Force Base and surrounding land in Solano County, Calif. Image: Google Maps Since 2017, a shadowy Silicon Valley company has bought up 52,000 acres of farmland around Travis Air Force Base in Solano County, Calif., totaling about $800 million.Flannery Associates is a company run by Jan Sramek, a 36-year-old former Goldman Sachs trader. Beyond that, nothing much is known of the company except that some of the most famous names in Silicon Valley have invested in a project being promoted by Flannery. Some backers include Marc Andreessen, Powell Jobs, Michael Moritz of Sequoia Capital, LinkedIn co-founder Reid...