On September 5, President Trump announced his decision to end the immigration program known as DACA, or Deferred Action for Childhood Arrivals. The announcement has prompted strong responses from scientists and other academics in Massachusetts. Even before it was official, MIT’s President, Rafael Reif, wrote an op-ed in the Boston Globe calling the repeal of DACA “a mistake” that “would run counter to our national interests.” On Thursday, some twenty professors were arrested during a protest in