The chief of the U.S. Capitol Police during the Jan. 6 siege has a book deal. Steven A. Sund’s “Courage Under Fire: Under Siege and Outnumbered 58 to 1 on January 6” will come out Jan. 3, just shy of the two-year anniversary of the riot by supporters of President Donald Trump. “It’s time to break my silence and reveal everything that I know happened,” Sund said in a statement released Monday by Blackstone Publishing. Sund resigned under pressure soon after Jan. 6 and testified the following month that he hadn’t seen an FBI field report warning of potential violence....