Microsoft CEO Satya Nadella said Monday that unfair tactics used by Google led to its dominance as a search engine, tactics that in turn have thwarted his company's rival program, Bing. Nadella testified in a packed Washington, D.C., courtroom as part of the government's landmark antitrust trial against Google's parent company, Alphabet. The Justice Department alleges Google has abused the dominance of its ubiquitous search engine to throttle competition and innovation at the expense of consumers, allegations that echo a similar case brought against Microsoft in the late 1990s.