 Major events in which he played a significant role for the executive branch included the Strategic Defense Initiative, Operation Urgent Fury, the Achille Lauro incident, Operation El Dorado Canyon (in response to Libyan terrorist attacks), and the Reykjavík Summit with the Soviets.The Iran–Contra affair resulted from the discovery of the United States' involvement in sending money and weapons to Iran for the release of American hostages from Lebanon, and sending aid to the Contras.This involvement was in violation of the Boland Amendment which prevented the United States from directly or indirectly being involved with the Contras.