secretary of state mike pompeo says return yeah is violating sanctions against north korea, citing what he calls credible reports of violation. he also says he's optimistic north korea will denuclearize. in california, windy hot effort will complicate of 40s to battle wildfires. two fires have destroyed 41 homes and threatened thousands more. now back to "dateline." >> welcome back to "dateline." i'm craig melvin. out over the western skies fellow pilots were searching for mckenzie morgan. no one was sure what happened to her aircraft. was she seriously injured or even worse? returning to our story, here is keith morrison. >> nine small planes were about to give up their search for a missing teenaged pilot, hope dying with the setting sun.