Chrissy Callahan / TODAY.com: Chadwick Boseman's Widow Reveals His Colon Cancer Symptoms Began Just Weeks Before Diagnosis - Simone Boseman opened up to TODAY's Craig Melvin about the diagnosis that changed her life forever. - Skip to table of contents - 'Black Panther' star Chadwick Boseman: 'There's a thirst' for Black superheroes