Swiss law prohibits selling war materiel to countries involved in armed conflict, a policy the country has already cited to block sales to Israel and Iran.

A surge of weapons is flowing from the U.S. to Mexico. These firearms — sourced from gun shops, shows, websites and apps — are funneled across the border to fuel the country’s most violent crimes.

Ukraine wants to leverage its defense expertise into security partnerships and to reap potentially vast profits for its arms industry.