NPR News Now covers the formal U.S. military withdrawal from Iraq, ending a two-decade presence and the anti-ISIS coalition. The report also details the escalating U.S.-Canada trade war, with new bans on Canadian goods, and features testimony from former Special Counsel Jack Smith regarding his probes of President Trump. Additionally, the episode reports on the arrest of a hacker linked to an FBI data breach, a Navy jet crash on the USS Eisenhower, and flood watches triggered by tropical moisture from a hurricane hitting Mexico.