NBC Nightly News S2026E46 - Feb 21 Sat

Roughly 66 million people are under winter alerts from Tennessee to Maine as residents in cities including Philadelphia, Boston and New York City are expecting anywhere from 9 to 20 inches of snow. NBC News' Valerie Castro reports. In a new interview with NBC News' Erin McLaughlin, Pima County Sheriff Chris Nanos in Arizona said that authorities' investigation into the disappearance of Nancy Guthrie is "still growing" three weeks after she vanished from her home in Tucson. Newly released records are raising concerns about another fatal shooting of a U.S. citizen by federal agents. The previously undisclosed incident happened in Texas in 2025. NBC News' Priscilla Thompson reports. NASA's moon rocket is facing a new setback after officials say there was a helium problem overnight. Now the launch date for the lunar mission, the first in more than 50 years, is up in the air. NBC News' Dana Griffin reports. The U.S. has officially logged 982 measles cases in 2026, the Centers for Disease Control and Prevention said Friday. It's more than four times the number of cases as this time last year, when a large outbreak was just beginning in West Texas. Now we're hearing from a college student who's recovered from the illness. NBC News' Erika Edwards reports.