Russia recently introduced a new frigate, the Admiral Grigorovich, and invited journalists on board at the Russian base in Sevastopol, Crimea. While the Russians have had a naval base in Sevastopol since the 18th century, Russia's seizure of the entire Crimean Peninsula from Ukraine in 2014 has heightened tensions with NATO. Corey Flintoff/NPR hide caption

The 307-foot tower at the University of Texas at Austin was the site of mass murder 50 years ago Sunday. Harry Cabluck/AP hide caption

Arnaldo Silva with his daughter Vanessa at StoryCorps. StoryCorps hide caption