Just days after the assault by Hamas ignited a new war in the Middle East, shipments of American weapons began arriving in Israel: smart bombs, ammunition and interceptors for the Iron Dome missile-defense system. When President Biden meets in Israel on Wednesday with Prime Minister Benjamin Netanyahu, more military aid is a likely topic. The conflict between Israel and Hamas is just the latest impetus behind a boom in international arms sales that is bolstering profits and weapons-making capacity among American suppliers. The surge in sales is providing the Biden…