largestk at the u.s., media company, largest issuer of credit cards, leading retailer, zoom out fromand it is two thirds of the fortune 100, three of the five biggest companies in the u.s., operator of the nation's largest integratoed -- largest integrated health care system. i could go on with this list forever but there is an article of faith about the competition i am unable to overcome. stuartthat was slack ceo butterfield. up next, i work from home breakout star, up 500% from last year, but not without controversy. ♪ funerals,dings, school, work, if it wasn't canceled, it often happened on zoom. companyoconferencing has kept families connected, but it was undermined by glaring security issues. ceo eric yuan spoke with us about how the company turned a corner. serving is beautiful enterprise business customers before this crisis. and we learned for the first time from consumers that we could do more, not only offer this service but also give them very strict security tools. we took action over. the past several weeks. emily: i want to get -- past several weeks. emily: i want to g