DHS revokes visa of one Columbia student, arrests another pro-Palestinian protester

The Department of Homeland Security (DHS) announced Friday it has revoked the visa of one Columbia University student and arrested another person involved in the pro-Palestinian protests, escalating its crackdown on those engaged in demonstrations over the conflict in Gaza.The stripping of the visa comes just days after the detention of Mahmoud Khalil, a former grad student at the university, by Immigration and Customs Enforcement (ICE). Khalil has a green card, which can only be revoked by an i