Nearly two weeks into Operation Epic Fury , the United States and Israel have killed Iran's Supreme Leader, degraded its nuclear program, and triggered the first closure of the Strait of Hormuz in history—taking 20 percent of the world's oil supply offline in a single week. Brent crude crossed $100 a barrel for the first time in four years, prompting the IEA's largest-ever emergency reserve release: 400 million barrels, coordinated across 32 nations. Iran has struck back at every Gulf neighbor