Venezuelan opposition leader and self-proclaimed acting president Juan Guaido stands under the national flag during a gathering with supporters after members of the Bolivarian National Guard joined his campaign to oust President Nicolas Maduro, in Caracas on April 30. Federico Parra/AFP/Getty Images hide caption
NPR's Ari Shapiro (center) interviews former Venezuelan special forces official Williams Cancino (right) in the Colombian town of Villa del Rosario. Ryan Kellman/NPR hide caption
A woman holds a placard reading "We Want Water and Electricity" as she shouts slogans during a protest in Caracas, Venezuela, about a lack of water and electric service during a new power outage in the country on Sunday. President Nicolás Maduro announced a 30-day electricity rationing plan to help as the government works to restore service. Federico Parra/AFP/Getty Images hide caption
Venezuela's President Nicolás Maduro sings the national anthem during an anti-imperialist rally for peace, in Caracas, Venezuela, on Saturday. Natacha Pisarenko/AP hide caption
Colombian police escort a Venezuelan soldier into Cúcuta, Colombia. The soldier surrendered at a bridge crossing the Venezuela-Colombia border, where people tried to carry humanitarian aid into Venezuela on Feb. 23. Fernando Vergara/AP hide caption
A worker inspects damage in a supermarket in Caracas on Sunday after it was looted during Venezuela's dayslong blackout. Carlos Garcia Rawlins/Reuters hide caption
Amid a widespread power outage in Venezuela on Thursday, relatives of a patient walk in the dark halls of a health clinic in Caracas. Ariana Cubillos/AP hide caption
Demonstrators throw stones at a line of Venezuelan National Guard troops along Venezuela's border with Brazil, at the Brazilian city of Pacaraima on Sunday. Ricardo Moraes/Reuters hide caption
An anti-government protester on Saturday in Caracas wears a sign that reads, "Venezuelans die for lack of medicines. Maduro is an assassin." Momentum is growing for opposition leader Juan Guaidó, who has called supporters into the streets. Rodrigo Abd/AP hide caption
Opposition leader Juan Guaidó talks to the press as he holds his daughter, Miranda, next to his wife, Fabiana Rosales, outside his home in Caracas on Thursday. Federico Parra/AFP/Getty Images hide caption
Venezuela's congressional leader, Juan Guaidó, is being recognized by a rising number of countries, including the U.S., as the South American country's interim president. Here, Guaidó (center) speaks to a crowd of opposition supporters at Bolívar Square, in eastern Caracas, last Friday. Federico Parra/AFP/Getty Images hide caption
Treasury Secretary Steven Mnuchin (right) and National Security Adviser John Bolton announce sanctions against Venezuela at the White House Monday. Evan Vucci/AP hide caption
Venezuela's National Assembly head Juan Guaidó waves during a mass opposition rally, during which he declared himself the country's acting president on Jan. 23. Federico Parra/AFP/Getty Images hide caption
Defense Minister Vladimir Padrino López delivers a message of support for Venezuelan President Nicolás Maduro in Caracas, Venezuela, on Thursday. A half-dozen generals belonging largely to district commands and with direct control over thousands of troops joined Maduro in accusing the United States of meddling in Venezuela's affairs and said they would uphold the socialist leader's rule. Venezuelan Defense Ministry press office via AP hide caption