Former Colo. Senator Ken Salazar at the 2013 Biennial of the Americas. 

(Courtesy Biennial of the Americas) 

Former Presidents of Colombia and Chile will be in Denver from July 14th-19th as a part of the 2015 Biennial of the Americas--a festival celebrating the art, ideas and culture of the Western Hemisphere.

The festival announced its symposium lineup Tuesday. Topics include drug legalization, city governance and strategies for improving trade in the Americas. Colorado Gov. John Hickenlooper and Denver Mayor Michael Hancock will also participate.

Former Newsweek Editor Tina Brown, Mexican Univision Host León Krauze and other prominent journalists will be on hand to moderate the discussions.