CARACAS, June 21, 2016 (Xinhua) -- An employee works during the validation of signatures as part of the campaign to activate the recall referendum in Caracas, Venezuela, on June 20, 2016. Venezuela's National Electoral Council (CNE) launched on Monday the validation process of 1,352,052 signatures on a petition to hold a recall referendum on President Nicolas Maduro. (Xinhua/Boris Vergara)