Catastrophic flooding in Nepal leaves hundreds dead, thousands missing as rescuers search through the rubble for survivors, Britt Clenett reports; Steven Portnoy has the latest on President's Trump extraordinary deal to take control of a large share of Venezuela's oil; Alex Presha has details on a deadly blast in Ukraine leaving multiple killed after a Russian strike on a warehouse packed with explosives; and Whit Johnson reports on divers going deep below to save the day for a bride to be; and more on tonight's broadcast of World News Tonight with David Muir. 00:00 Intro 02:08 New video showing catastrophic flooding in Nepal, heavy rains turning mud into cement 04:46 New U.S. deal to control Venezuela oil production. Some analysts say it will take years to see benefits 06:48 A deadly Russian blast in Ukraine leaves dozens killed 08:19 Two arrested in what authorities called a million-dollar online romance scam 09:27 A Texas woman says she was ejected and severely injured while rid...