The recent deaths of four horses at Churchill Downs have activists calling for change ahead of the Kentucky Derby. WAVE’s Brandon Spencer reports. » Subscribe to NBC News: http://nbcnews.to/SubscribeToNBC » Watch more NBC video: http://bit.ly/MoreNBCNews NBC News Digital is a collection of innovative and powerful news brands that deliver compelling, diverse and engaging news stories. NBC News Digital features NBCNews.com, …

The White House says 1,500 troops will be sent to the southern border to help process an anticipated wave of immigrants. ABC’s Justin Finch has a reaction. Original source (ABC/Youtube)

A Ukrainian delegate punched a Russian delegate in the face during a summit of Black Sea nations in the Turkish capital, after his Ukrainian flag was snatched away to stop him photobombing a video interview with Russia’s lead delegate. Video showed Ukraine’s Olesandr Marikovski hitting the Russian and retrieving the blue and yellow flag. » Subscribe to NBC News: http://nbcnews.to/SubscribeToNBC …