Perhaps the biggest news story in American journalism so far this year is the huge infusion of cash it has received, more than half a billion dollars, from American tech leaders. Founders of eBay, Amazon, and Facebook are among a growing group of tech entrepreneurs who want to build a bright new future for American media, and they are putting their minds—and their checkbooks—to the challenge. Pierre Omidyar’s $250 million investment in a new digital media company came on the heels of Jeff Bezos’s purchase of The Washington Post for a similar amount. Their goal? To overhaul the business model—and the focus—of our fourth estate.