U.S. envoys meet with Ukrainian and Russian officials as peace talks stall over territory disputes. The NTSB investigates a deadly Amazon cargo plane crash at Miami International Airport that killed at least five people. Nepal observes a day of mourning for victims of devastating floods while rescuing survivors from buried tunnels. Hurricane Lulu approaches Hawaii with destructive winds and heavy rain. Finally, smart ring maker Aura prepares for a Nasdaq IPO, revealing massive biometric data collection and strong subscriber loyalty.