Nashville police were warned in 2019 that Anthony Warner was making a bomb inside his RV — but nothing was done to stop him. Warner’s girlfriend told Nashville cops on Aug. 21, 2019, that he “was building bombs in the RV trailer at his residence,” according to a report Tuesday in The Tennessean. City cops passed the tip off to the FBI and ATF. But when authorities showed up at Warren’s door no one answered, and a subsequent request to search the property was denied, The Tennessean reported. Warner’s bomb-making then continued unhindered until Christmas morning, when he detonated explosives...