The document argues that re-establishing a U.S. diplomatic presence in Iran would advance American national security and better serve U.S. citizens. It notes that the U.S. lost its ability to understand events in Iran after losing its embassy in 1979. A diplomatic presence could help formulate policy and provide consular services. While some argue this could reward Iran, the document contends now is an opportunity with nuclear negotiations ongoing and Iranian-American citizens would benefit from improved access. A phased approach starting with interests sections could test the waters and address security concerns.