Microsoft unveiled an update to Bing on Thursday that strongly leverages social networks, including a redesigned interface to provide a three-column look. Responses to queries keyed into Bing will list experts and the user’s friends, who can comment on the topic in the right panel. A new feature called “Snapshot” will display useful information about a specific place or topic in the middle column. The updated version of Bing will roll out over the next few weeks and will be broadly available in the United States in early June. It will run on desktops and smartphones.