National News A clip of a confrontation on Harvard’s campus is going viral. Here’s what we know. Newly surfaced footage shows a tense confrontation between a group of protesters and a Harvard student during a pro-Palestinian demonstration last month. A pro-Palestinian "die-in" ended on the lawn behind Klarman Hall at Harvard Business School on Oct. 18. Pat Greenhouse/Boston Globe Staff As controversy over the Israel-Hamas war continues to roil Harvard University’s campus, newly surfaced videos show a tense confrontation between a group of pro-Palestinian protesters and a Harvard student. The footage appears to depict an incident that occurred during an...