A Minnesota man who said he idolized the shooter who killed five people at a gay nightclub in Colorado Springs and was building an arsenal of automatic weapons to use against police was arrested this week as he tried to buy grenades from an FBI informant, according to charges filed this week. River William Smith, who also expressed interest in joining neo-Nazi paramilitary groups and fired an AK-47-style rifle in his home in 2019 faces federal weapons charges, the U.S. Attorney's Office announced in a news release. FBI agents arrested the 20-year-old man on Wednesday after he purchased three hand...