FILE – A sign is shown on a Google building at their campus in Mountain View, Calif., on Sept. 24, 2019. (AP Photo/Jeff Chiu, File)

WASHINGTON (AP) — Google will confront a threat to its dominant search engine beginning Tuesday when federal regulators launch an attempt to dismantle its internet empire in the biggest U.S. antitrust trial in a quarter century. Over the next 10 weeks, federal lawyers and state attorneys general will try to prove Google rigged the market in its favor by locking its search engine in as the default choice in a plethora of places and devices.