she fell and they can't find her. >> where was leslie mueller? and did she survive. >> all of a sudden i hear yelling. yelling is coming from downstream. >> when "dateline" continues. eze driftin' on by ♪ ♪ you know how i feel ♪ copd may have gotten you here, but you decide what's next. start a new day with trelegy. ♪ ...feelin' good ♪ no once-daily copd medicine has the power to treat copd in as many ways as trelegy. with three medicines in one inhaler, trelegy helps people breathe easier and improves lung function. it also helps prevent future flare-ups. trelegy won't replace a rescue inhaler for sudden breathing problems. tell your doctor if you have a heart condition or high blood pressure before taking it. do not take trelegy more than prescribed. trelegy may increase your risk of thrush, pneumonia, and osteoporosis. call your doctor if worsened breathing,