Students clash with riot police during a protest against the government of Venezuelan President Nicolas Maduro, in Caracas on March 7, 20145, 2014Venezuelans will march again on Saturday against the country’s chronic food shortage, one of the major grievances in a wave of protests shadowing President Nicolas Maduro’s government. At least 20 people have now died in Venezuela since protests first erupted a month ago, giving Maduro his biggest test since succeeding late leader Hugo Chavez almost a year ago. The new rally was called by the country’s most prominent opposition leader, two-time presidential election runner-up Henrique Capriles, who lost to Maduro by a whisker in the April 2013 election. The rally, which coincides with International Women’s Day, will include a march by stay-at-home moms who will bang empty pots – a traditional form of protest across Latin America.