[1/5] Pro-Palestinian students take part in a protest in support of the Palestinians amid the ongoing conflict in Gaza, at Columbia University in New York City, U.S., October 12, 2023. REUTERS/Jeenah Moon Acquire Licensing Rights NEW YORK, Oct 12 (Reuters) - At Columbia University on Thursday, two groups of hundreds of students tensely faced each other in dueling pro-Israel and pro-Palestinian demonstrations, while university officials blocked public access to the New York City campus as a safety measure. Supporters of Palestinians, many of whom wore face masks to hide their identities, held signs in a grassy area near a library...