and don't miss our exclusive interview with irene rosenfeld, ceo of momdelez. >> big interview. >> stay tuned. we'll be right back on wor "worldwide exchange." whole communities are living on mars and solar satellites provide earth with unlimited clean power. in less than a century, boeing took the world from seaplanes to space planes, across the universe and beyond. and if you thought that was amazing, you just wait. ♪ >>> welcome back to "worldwide exchange." an update on the zika virus. the first known case of zika transmission in the united states was reported in texas. the centers for disease control say the virus was contracted through sex and not through a mosquito bite. this comes just one day after the world health organization declared zika an international public health emergency. and that brings us to this morning's must-read in "usa today." the editorial board writing, quote, zika's dos and don'ts, our view. it's an effort to tame the fears surrounding this outbreak. they say the world health organization's language that the virus is spreading explosively in the americas an