the new wearable technology aimed at saving lives and serena williams back on the court. inside her return to wimbledon. announcer: this is nbc nightly news with lester holt good evening a rapidly shifting patchwork of abortion laws tonight as the battle in the wake of roe v. wade s demise spills from the chambers of the u.s. supreme court to state courtrooms across america. tonight abortion rights supporters in more than a half dozen states putting up legal challenges, trying to block abortion bans. many of the new laws designed to automatically go into effect following the court s decision including louisiana, where a judge temporarily halted enforcement of that state s trigger law. over the weekend in cities across the country thousands marched in protest to the supreme court s decision to end a constitutional right to abortions today senate minority leader mitch mcconnell savoring the court s decision after years of work. but new polling suggesting the decision is
temperatures topped 90 degrees today as employees at tuscaloosa s black warrior brewing lugged kegs and set up palettes of cans in the scorching sun. but now they re equipped with a new tool wearable arm tech that displays your core temperature. you re wearing the armband. yep what does that measure? it measures our heart rate, our exertion level, and our core temperature reporter: knowing that 106 degrees is the point when the human body starts to break down and heat-related illness sinks in could this have prevented something more serious from happening? absolutely. i ve seen a lot of serious stuff happen in a lot of heat incidents. reporter: osha is the driving force behind a new program just unveiled in april for small to medium-sized businesses whose workers operate in a heat index of 80 degrees or higher. the federal agency reaches out to some businesses, but anyone