Nov. 15 (Bloomberg Law) -- Bloomberg Law's Lee Pacchia runs through the week's most important legal news. Big changes may be in store for Google. The tech giant was given an ultimatum by FTC Chairman Jonathan Leibowitz to settle its pending antitrust probe in the coming days or face a lawsuit, sources tell Bloomberg News. Next, voters in Colorado and Washington legalized marijuana for recreational use last week, but the federal government still bans the drug. Finally, more big firms are feeling the urge to merge. On Wednesday, the UK's Norton Rose announced it is merging with U.S. firm Fulbright & Jaworski, creating a 3,800-attorney firm with 55 offices worldwide.