January 21, 2019 4:18 pm Commuters Face Subway Signal Problems Amid Bitter Cold Several subway lines had signal problems on Monday morning — and the MTA is examining whether cold weather may have played a role. Andrew Siff reports. Local 0:23 Pro-Palestinian protesters take over Hamilton Hall at Columbia University 3:01 I-Team: NYPD officers testify in surveillance video controversy 1:59 2 suspects charged with murder in Long Island body parts case 2:35 Extra NYPD patrols in Central Park after series of violent crimes 3:01 Columbia begins suspending students after protesters defy deadline