Russia's election ad campaign shows Facebook's biggest problem is Facebook

Facebook’s systems didn’t fail when they let Russians target American voters with divisive political messages. They workedMark Zuckerberg marked his return from paternity leave Thursday with a concerted effort to put lipstick on the pig of Facebook’s role in swaying the 2016 presidential election. In a Facebook live address from an earth-toned, glass-walled office, the chief executive laid out a series of steps the company will take to “protect election integrity and make