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As students return to Columbia, the epicenter of a campus protest movement braces for disruption

Pro-Palestinian supporters march to Barnard College during the picket line outside Columbia University, Tuesday, Sept. 3, 2024, in New York. (AP Photo/Yuki Iwamura)

Pro-Palestinian supporters march to Barnard College during the picket line outside Columbia University, Tuesday, Sept. 3, 2024, in New York. (AP Photo/Yuki Iwamura)

NYPD officers detain a pro-Palestinian supporter as they hold picket line outside Barnard College, Tuesday, Sept. 3, 2024, in New York. (AP Photo/Yuki Iwamura)

NYPD officers detain a pro-Palestinian supporter as they hold picket line outside Barnard College, Tuesday, Sept. 3, 2024, in New York. (AP Photo/Yuki Iwamura)

Pro-Palestinian supporters hold picket line outside Barnard College, Tuesday, Sept. 3, 2024, in New York. (AP Photo/Yuki Iwamura)

Pro-Palestinian supporters hold picket line outside Barnard College, Tuesday, Sept. 3, 2024, in New York. (AP Photo/Yuki Iwamura)

Pro-Palestinian supporters hold picket line outside Barnard College, Tuesday, Sept. 3, 2024, in New York. (AP Photo/Yuki Iwamura)

Pro-Palestinian supporters hold picket line outside Barnard College, Tuesday, Sept. 3, 2024, in New York. (AP Photo/Yuki Iwamura)

Pro-Palestinian supporters hold picket line outside Barnard College, Tuesday, Sept. 3, 2024, in New York. (AP Photo/Yuki Iwamura)

Pro-Palestinian supporters hold picket line outside Barnard College, Tuesday, Sept. 3, 2024, in New York. (AP Photo/Yuki Iwamura)

FILE - Student protesters gather inside their encampment on the Columbia University campus, on April 29, 2024, in New York. (AP Photo/Stefan Jeremiah, File)

FILE - Student protesters gather inside their encampment on the Columbia University campus, on April 29, 2024, in New York. (AP Photo/Stefan Jeremiah, File)

A pro-Israel student holds a sign while pro-Palestinian supporter hold picket line outside Barnard College, Tuesday, Sept. 3, 2024, in New York. (AP Photo/Yuki Iwamura)

A pro-Israel student holds a sign while pro-Palestinian supporter hold picket line outside Barnard College, Tuesday, Sept. 3, 2024, in New York. (AP Photo/Yuki Iwamura)

NYPD officers detain a pro-Palestinian supporter as they hold picket line outside Barnard College, Tuesday, Sept. 3, 2024, in New York. (AP Photo/Yuki Iwamura)

NYPD officers detain a pro-Palestinian supporter as they hold picket line outside Barnard College, Tuesday, Sept. 3, 2024, in New York. (AP Photo/Yuki Iwamura)

NYPD officers detain a pro-Palestinian supporter as they hold picket line outside Barnard College, Tuesday, Sept. 3, 2024, in New York. (AP Photo/Yuki Iwamura)

NYPD officers detain a pro-Palestinian supporter as they hold picket line outside Barnard College, Tuesday, Sept. 3, 2024, in New York. (AP Photo/Yuki Iwamura)

NYPD officers detain a pro-Palestinian supporter as they hold picket line outside Barnard College, Tuesday, Sept. 3, 2024, in New York. (AP Photo/Yuki Iwamura)

NYPD officers detain a pro-Palestinian supporter as they hold picket line outside Barnard College, Tuesday, Sept. 3, 2024, in New York. (AP Photo/Yuki Iwamura)

NYPD officers detain a pro-Palestinian supporter as they hold picket line outside Barnard College, Tuesday, Sept. 3, 2024, in New York. (AP Photo/Yuki Iwamura)

NYPD officers detain a pro-Palestinian supporter as they hold picket line outside Barnard College, Tuesday, Sept. 3, 2024, in New York. (AP Photo/Yuki Iwamura)