of having plug type tours which were inherently very unlikely to part company with the aircraft because they are held in like a bath plug by they are held in like a bath plug by the pressure of the air in the cabin. these two doors are quite uniquely not plug type doors and thatis uniquely not plug type doors and that is certainly part of the history of this event with the alaska airlines aircraft which has cast a shadow more widely on 737 max. ~ , ., cast a shadow more widely on 737 max. ~ , ., ., cast a shadow more widely on 737 max. ~ ,., ., ., cast a shadow more widely on 737 max. ~ ., ., ., . ., max. tim atkinson, a former aircraft accident investigator, max. tim atkinson, a former aircraft accident investigator, thank - max. tim atkinson, a former aircraft accident investigator, thank you - accident investigator, thank you very much for sharing your story. around the world and across the uk, this is bbc news. bbc news, bringing you different stories from across the uk.
the water supply for seven out of every ten people that live in the state of nevada. so we need to know that we have secure access. reporter: so 600 feet below ground, and three miles along a dark narrow tunnel beneath lake mead, engineers have found a solution, seven years in the making, at a cost of $817 million. each and every time i come down with shock and awe. it is truly an impressive sight. reporter: this is the end of the tunnel and this is the critical point. up above us, 40 feet, is the hemisphere cal cap. think of it as a giant bath plug. above that the waters of lake mead. and in a few weeks time, that plug will be lifted and those waters will flood this tunnel. and because it s quite literally at the bottom of the lake it will guarantee water supply for thirsty las vegas even as those sinking lake levels threaten to leave the two much older water intake tunnels above the water
600 feet down and three miles along a dark narrow tunnel. the culmination of a seven-year, $817 million project. this is the end of the tunnel, and this is the critical point. up above us, 40 feet is the hemispherical cap. think of it a giant bath plug. above that lake mead. and in a few weeks time that plug will be lifted and those waters will flood this tunnel. because it s at the bottom of the lake, it will guarantee the water supply for thirsty las vegas even as sinking lake levels threaten to leave the other two much older water intake tunnels above the water line and effectively useless. when you consider the fact that we re responsible for providing water to 2 million people and 40 million annual visitors to the economic engine of the state of nevada, this is a responsibility that we don t take lightly.
the water supply for seven out of every ten people that live in the state of nevada. so we need to know that we have secure access. reporter: so 600 feet below ground, and three miles along a dark narrow tunnel beneath lake mead, engineers have found a solution, seven years in the making, at a cost of $817 million. each and every time i come down with shock and awe. it is truly an impressive sight. reporter: this is the end of the tunnel and this is the critical point. up above us, 40 feet, is the hemisphere cal cap. think of it as a giant bath plug. above that the waters of lake mead. and in a few weeks time, that plug will be lifted and those waters will flood this tunnel. and because it s quite literally at the bottom of the lake it will guarantee water supply for thirsty las vegas even as those sinking lake levels threaten to leave the two much older water intake tunnels above the water