From CBS News:
Sen. Chuck Grassley, a Republican from Iowa, sent a letter to the head of the Bureau of Alcohol, Tobacco, Firearms and Explosives on Tuesday requesting all records relating to Project Thor and a briefing on the program, which was an interagency initiative launched in 2018 aimed at identifying and dismantling the supply chains across the U.S. that provide weapons to Mexican drug cartels. The effort was denied funding for fiscal year 2022 by ATF, CBS News found.