Stefan Bradley, a history professor at Amherst College touches on the similarities and differences between the protests of the 1960s and now.

NYPD enters campus Tuesday evening in reported move to dispel students who took over academic building earlier in the day

Everywhere there is gloom, and uncertainty about what happens next at Columbia University. Students told the BBC that the university's decision to call in police to clear a Gaza protest late on Tuesday, leading to a raid on the occupied Hamilton Hall and hundreds of arrests, has left the college community shattered.