tom? eva pilgrim with that new video tonight. eva, thank you. around the world, new developments in venezuela s growing political crisis. a hijacked police helicopter opening fire. you heard it there, and dropping grenades on the supreme court, and interior ministry buildings. the venezuelan president calling it a terrorist attack. and at the same time, this pilot posting this online, calling for a rebellion. months of anti-government protests have taken at least 75 lives. next, the global cyberattack revealing a threat to americans. the ransomware attack striking at least 65 currents, including the u.s. among the targets here, hospitals, putting lives at risk. nightline anchor, dan harris reports that hospitals and medical systems may not be ready for another attack. reporter: the ransomware virus known as petya has taken out computer systems all over the planet, including those at hospitals near pittsburgh. she called me and said surgery was canceled because the