Security forces check a nearby building after an explosion was heard while Venezuelan President Nicolas Maduro was attending a ceremony to celebrate the 81st anniversary of the National Guard, in Caracas on August 4, 201 - Venezuelan President Nicolas Maduro was unharmed after an exploding drone "attack" interrupted his speech at a military ceremony, the minister of communication Jorge Rodriguez said following the incident. (Photo by Juan BARRETO / AFP) (Photo credit should read JUAN BARRETO/AFP/Getty Images)