say there were life jackets on the boat but our nbc affiliate is reporting itt does appear riders hadhem . the safety is being called into question again after this accident. the tourist attraction is operated across the country including right here in d.c. >> we look at some of those past problems. >> reporter: popular tourist attraction. a tour going from land in water. first used in world war ii in the military. some say it make it difficult to drive on both. safety advocates calling for added regulations and even out right bans. in 1999, 13 people drowned when a duck boat sank without warning. the ntsb blaming it on inadequate maintenance. the vehicle sank so rapidly that no one was able to dawn a life jacket. >> it's been a terrible loss of life and there's been interies. >> rep in 2015, five college students were killed in seattle when a duckedoat cra into a charter bushi. all thems were on the bus. >> operators of the bus say they place a premium on safety. look for updat on the latest of this accident. >>> here at home starting torrow a big portion of metro's red line will be shu