Photo taken on July 23, 2019 shows the city view of Caracas, Venezuela. Preliminary investigation has shown that "an electromagnetic attack" is the probable cause of the massive blackout hitting most parts of Venezuela earlier Monday, an official said. The power outage affected much of the country (about 17 states) as of 4:40 p.m. local time (2040 GMT), including the capital district. (Xinhua/Marcos Salgado)??