The Trump administration is demanding that Iran give up its strategic missile program as part of any nuclear deal. But Iran’s ballistic missiles do not violate international law nor is there any global treaty under which they are banned. Article 51 of the UN Charter clearly states that countries have the sovereign right to develop conventional weapons for self-defense which means that Iran’s missile program is perfectly legal. Iran has every right to build as many missiles as it wants, and it is not required to get Washington’s approval to do so. More importantly, Iran needs these missiles to defend itself against any potential attack by the United States and Israel. This is not simply a matter of Iran’s sovereign right to self-defense, but an issue of regional security that has been greatly undermined by persistent US-Israel hostilities across the Middle East. A strong, well-armed Iran serves as a deterrent to US-Israel intervention which increases the prospects for peace in the region.