Tristan Thompson has officially been sworn in as a U.S. citizen. The 29-year-old NBA star, fresh from signing with the Bolton Celtics for $19 million, swore his allegiance to the United States ahead of the weekend, with social media now speaking of nothing else. Tristan, also in the news as baby mama Khloe Kardashian seemingly takes him back and reportedly plans to move to Boston to live with him and the couple's daughter True, was sworn in last week, and has since spoken of it. Check it out below.