Massachusetts December 6, 2021 11:08 am Omicron Cases on the Rise, New Travel Restrictions Take Effect With omicron cases on the rise across the globe, new restrictions for international travelers entering the U.S. took effect Monday. US & World Videos 2:31 Fallen Billerica Police Sgt. Ian Taylor honored at vigil 2:39 MIT president calls for shutdown of student encampments 0:16 4 people seriously hurt after boat sinks off Cape Cod 2:35 Fallen Billerica police sergeant honored during vigil 2:09 President of MIT calls for shutting down pro-Palestinian encampments