Tonight, 10 p.m. - The team looks into a murder at the museum.

The incredible story of Welles Crowther, a 9/11 hero who tragically died saving others.

Fighter pilot reflects on order to sacrifice herself to stop Flight 93 on 9/11

Sunday, 5:30 p.m. - An update on the tourism industry in Las Vegas from LVCVA CEO Steve Hill.

Life begins to rebound after the destruction of the mass extinction ending the Permian Period.

Ultrasound waves, no surgery: doctors may have found a way to silence addiction and cravings.

Could psychedelics cure phantom limb pain? Amputee Miles O’Brien puts it to the test.