the epa chief in ohio again today as officials battle over where to send the waste from that toxic train derailment. why the epa s plan to transport contaminated water to texas is back on after local leaders objected. the new drone strike deep inside russia, and our rare look inside crimea. will it become the new flash point in the conflict? the white house giving a deadline to remove tiktok from all government devices. could the popular app be banned altogether in the u.s.? and the american skier who just made history on the world stage. announcer: this is nbc nightly news with lester holt. good evening and welcome, everyone, in a pair of cases that will impact tens of millions of student loan borrowers, the supreme court heard arguments today on whether the biden administration had the authority to forgive some of those loans. the president s loan debt relief plan calls for erasing up to $20,000 in student loans for certain borrowers at an estimated cost of $400
it really was a bit of a david and goliath story. reporter: meet david, better known as jessie diggins. the 31-year-old from minnesota conquering those cross-country juggernauts by taking the top spot at this week s world championship. it s been years and years and years in the making. so it s been very emotional. reporter: diggins wears that emotion like the gold sparkles that adorn her face on race days, along with the sheer exhaustion after a grueling 10 kilometer race. i want to know that i left it all out there, and i couldn t possibly have tried any harder. reporter: diggins first burst on to the world stage in pyeongchang in 2018 with this gold medal finish. jessie diggins delivering a landmark moment! reporter: but for her, it s always been about more than bringing home medals. it s so possible if you work hard, surround yourself with