Why bitcoin briefly crashed under $30,000 after China's crypto crackdown: CNBC After Hours

CNBC.com's MacKenzie Sigalos brings you the day's top business news headlines. On today's show, CNBC's Kate Rooney explains bitcoin's wild ride after Chinese regulators cracked down on crypto mining. Plus, the Biden administration says it could fall short of an ambitious goal—getting 70 percent of Americans at least partially vaccinated against Covid-19.