<h2>Overview</h2> <p>On <strong>April 4, 2026</strong>, Iraq sealed the <span class="key-term" data-definition="Shalamcheh border crossing — a major land link between Iraq and Iran, vital for trade and security (GS2: Polity)">Shalamcheh border crossing</span> after an Iranian airstrike on the Iranian side killed an Iraqi national and left at least five Iraqis seriously wounded. The incident adds to a series of escalatory moves, including the downing of U.S. aircraft and a rejected cease‑fire proposal.</p> <h3>Key Developments (April 4, 2026)</h3> <ul> <li>Iranian airstrike hits a passenger reception area on the Iranian side of the border, killing an Iraqi citizen and wounding five others.</li> <li>Iraq responds by closing the <span class="key-term" data-definition="Shalamcheh border crossing — a major land link between Iraq and Iran, vital for trade and security (GS2: Polity)">Shalamcheh border crossing</span> with Iran.</li> <li>Iran’s atomic agency reports an airstrike near the <span class="key-term" data-definition="Bushehr nuclear facility — Iran's sole civilian nuclear power plant on the Persian Gulf, often a focal point in regional security debates (GS3: Security)">Bushehr nuclear facility</span>, killing a guard and damaging a support building.</li> <li>Iran claims to have shot down a U.S. <span class="key-term" data-definition="F‑15 — twin‑engine air superiority fighter used by the U.S. Air Force; its loss marks the first U.S. fighter downed inside Iran since the war began (GS2: Polity/Defense)">F‑15</span> warplane; U.S. media say special forces rescued one of the two crew members.</li> <li>Iran also says it downed a U.S. <span class="key-term" data-definition="A‑10 — close‑air support aircraft known as the ‘Warthog’, designed for ground‑attack missions (GS2: Polity/Defense)">A‑10</span> in the Gulf; the pilot was reportedly rescued.</li> <li>Tehran rejects a U.S. proposal for a 48‑hour <span class="key-term" data-definition="Ceasefire — a temporary halt to hostilities, often used as a confidence‑building measure in conflict resolution (GS2: Polity/International Law)">ceasefire</span>, allegedly conveyed through an unnamed third country.</li> </ul> <h3>Important Facts</h3> <ul> <li><strong>Casualties:</strong> 1 Iraqi citizen killed; at least 5 Iraqis seriously wounded.</li> <li><strong>Strategic sites targeted:</strong> Passenger reception area near the border; <span class="key-term" data-definition="Bushehr nuclear facility — Iran's sole civilian nuclear power plant on the Persian Gulf, often a focal point in regional security debates (GS3: Security)">Bushehr nuclear facility</span> (fourth strike on the plant).</li> <li><strong>Aircraft losses:</strong> One U.S. <span class="key-term" data-definition="F‑15 — twin‑engine air superiority fighter used by the U.S. Air Force; its loss marks the first U.S. fighter downed inside Iran since the war began (GS2: Polity/Defense)">F‑15</span> and one U.S. <span class="key-term" data-definition=