An expiring United Nations weapons embargo on Iran must remain in place to prevent it from “becoming the arms dealer of choice for rogue regimes and terrorist organizations around the world,” the U.S. special representative to Iran said Sunday. Brian Hook told The Associated Press that the world should ignore Iran’s threats to retaliate if the arms embargo set to expire in October is extended, calling it a “mafia tactic.” Among its options, the Islamic Republic could expel international inspectors monitoring Iran’s nuclear program, deepening a crisis created by President Donald Trump unilaterally withdrawing from Tehran’s 2015 atomic accord with global powers.