The National Post reports in its Friday edition that in 2009, when Google was embarking on its on-line advertising business, a company executive told colleagues the goal was to "crush" rival ad networks, according to evidence presented by prosecutors at Google's antitrust trial in Alexandria, Va., Wednesday. An bylined item in the Post reports that the U.S. Department of Justice claims that Google has sought to monopolize markets among publisher ad servers and ad networks. Prosecutors have introduced evidence of how Google employees thought about the company's products. The DOJ alleges the company set out to dominate the ad tech market. "We'll be able to crush the other networks and that's our goal," David Rosenblatt, Google's former president of display advertising, said in late 2008. Google denies the allegations, arguing it faces fierce competition from rival digital advertising companies. The notes from Mr. Rosenblatt's talk showed him discussing the advantages of owning technology on both sides and in the middle of the market. Google has said it is not the only company to offer an integrated suite of products for advertisers and publishers, and that Microsoft, Amazon and Meta have similar offerings.