tomorrowight, magic johnson, and music from antibalas. "nightline" is next. thanks for watching. on "nightline," vanished abroad. a young american mother disappears in the final days of her dream vacation. the only clues, surveillance videos and a final message home. >>> hilary's next chapter. in her final days as secretary of state, hillary clinton opens up about benghazi, her health scare and how she's not ruling out running for president. >>> the latest on the wild weather ripping across the heartland. the extreme wind, hail, and tornados set to strike from texas to michigan. >>> from washington, this is "nightline" with cynthia mcfadden. >>> again, and thanks for joining us. tonight, the frantic international search for the young american mother who suddenly vanished while traveling alone on a dream vacation. it was her first trip overseas, but right before she was supposed to return home to her husband and her two young boys in new york, she disappeared without a trace. abc's juju chang brings us the latest. >> reporter: it was the trip of a lifetime complete with artsy inst