Boston Duck Tours July 20, 2018 7:40 am Safety Concerns Over Boston Duck Tours After Missouri Accident Safety concerns have been brought to light over the Boston Duck Tours after a similar vehicle capsized in Missouri, killing 11 people. 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