 A fight between Ugandan and Libyan presidential guards sparked chaos during a ceremony attended by the heads of state from 11 African nations on March 19, 2008.Azeotrope

An azeotrope () or a constant boiling point mixture is a mixture of two or more liquids whose proportions cannot be altered or changed by simple distillation.This happens because when an azeotrope is boiled, the vapour has the same proportions of constituents as the unboiled mixture.