A deadline is at hand for migrants hoping to enter the U.S. from Mexico. The end of COVID-19 curbs on asylum seekers expires late Thursday night. In its place, the Biden administration is promising a crackdown on illegal crossings. That made Thursday a day of desperation for many. Lisa Desjardins reports. Stream your PBS favorites with the PBS app: https://to.pbs.org/2Jb8twG Find more from PBS NewsHour at https://www.pbs.org/newshour Subscribe to our YouTube channel: https://bit.ly/2HfsCD6 Follow us: Facebook: http://www.pbs.org/newshour Twitter: http://www.twitter.com/newshour Instagram: http://www.instagram.com/newshour Subscribe: PBS NewsHour podcasts: https://www.pbs.org/newshour/podcasts Newsletters: https://www.pbs.org/newshour/subscribe