Twitter is expanding Birdwatch, its crowdsourced “misinformation” debunking tool, to 50 percent of all U.S. Twitter users. Gizmodo reports that Twitter is expanding Birdwatch, its community-powered “misinformation” debunking service that it “for the people, by the people.” The service will now be expanded as Twitter prepares to include 50 percent of all U.S. users in the service, meaning that in the coming days it is likely that you will see notes added to tweets in your timeline written by Birdwatch contributors providing additional information or context. Beginning this week, Twitter will accept 1,000 new contributors per week to Birdwatch adding...