. >>> nancy giles shows us why tie-dye, the freak flag of the '60s, is still flying high. >>> lee cowan test drives that may be the hottest car in america. >>> plus, conor knighton on the latest addition to the american toolbox. >>> we'll have a tea party with martha stewart and more all on our "sunday morning" by design. we'll be right back. ♪ ♪ ♪ ♪ . >>> much has been made over the years about living the california dream. the question is, can money, a lot of money, build that dream from the ground up? luke burbank found place where some tech giants are trying to do just that. >> reporter: for over five years, starting back in 2018, something mysterious was going on. >> it's a nearly billion dollars land purchase. >> reporter: just 90 minutes northeast of san francisco -- >> no one, not even the federal government, can figure out who is behind it. >> reporter: a secretive group was purchasing farmland. some 60,000 acres in rural solano county, california. many feared it might be a chinese governmnt plot to try to set up shop near travis air force base. >> like a lot of people,