found: Work cat.: World oil transit chokepoints, 2008.
found: Asias Middle East oil dependence : chokepoints on a vital maritime supply line, 2007.
found: Chokepoints : maritime economic concerns in the Southeast Asia, 1996.
found: Southeast Asian chokepoints : keeping sea lines of communication open, 1996.
found: Wikipedia, Jan. 23, 2009(Choke point: in military strategy, a choke point (or chokepoint) is a geographical feature on land such as a valley or defile, or at sea such as a strait which an armed force is forced to pass, sometimes on a substantially narrower front, and therefore greatly decreasing its combat power, in order to reach its objective ... choke points remain a prominent issue today in the global economy and shipments of goods, particularly oil. Twenty percent of the world's oil is shipped through the Strait of Hormuz, which has seen previous conflicts such as the downing of Iran Air Flight 655 by American missiles in 1988. The Suez Canal and Sumed Pipeline carry 4.5 million barrels a day. The canal was closed for eight years after the Six Day War in 1967. In many instances, alternate routes are non-existent or unpractical)