November 9: Houston fire chief on deadly Astroworld Festival. Push to vaccinate kids intensifies. January 6 committee issues six subpoenas to top Trump campaign associates. New research on sleep and heart health.

New details on the ongoing criminal investigation into Astroworld Festival as victims’ families being to speak out and rapper Travis Scott announces he will cover funeral costs and refund all attendees — Savannah Guthrie speaks with Houston fire chief, Samuel Peña. Plus, the push to vaccinate children intensifies as the Biden administration urges appeals court not to block new coronavirus vaccine rules for large businesses. Also ahead, the January 6th committee issues six subpoenas to top Trump campaign associates — chief White House correspondent Peter Alexander has the latest. And, what does your bedtime have to do with heart health? Researchers are revealing the exact hour you should fall asleep to lower risk of heart disease.