news out they are doing military exercises around the straight that controls a large percentage of oil traffic....these are exercises supposedly aimed to see what it will take to close the straight.

"The strait at its narrowest is 54 kilometres (34 mi) wide.[1] It is the only sea passage to the open ocean for large areas of the petroleum-exporting Persian Gulf. About 13 tankers carrying 15.5 million barrels (2,460,000 m3) of crude oil pass through the strait on an average day, making it one of the world's most strategically important choke points. This represents 33% of the world's seaborne oil shipments, and 17% of all world oil shipments in 2009.[2]"