MIT professor warns Trump's actions threaten academic freedom

Professors are expressing concern about the Trump administration’s feud with the nation’s top universities. Alan Lightman, professor of the practice of humanities at the Massachusetts Institute of Technology, joins “America Decides” with his perspective.

May 7: CBS News 24/7, 4pm ET

Jury finds three Memphis police officers not guilty in the beating death of Tyre Nichols; Protesters take over Butler Library on Columbia University campus.