now to the cnn exclusive, a commercial drone may have been used for the first time in a plot to kill a head of state. the target, embattled venezuelan president nicolas maduro. cnn learned the failed attempt happened last august. new videos we obtained show the plot involved commercial devices bought online and prepared over weeks by army defectors. nick paton walsh has this exclusive. >> reporter: they thought it was fireworks first, but it was a drone bomb. the brazen assassination attempt against nicolas maduro. the first bid to kill a world leader with commercial drone technology bought online, it could have killed everyone on the stage or dozens of civilians nearby if it missed. the crowd scattered and venezuelans began to wonder what really happened. was it a fake? even now the opposition leader