voting for the glen canyon dam. even bigger than his vote against the civil rights act. the vote against the wilderness act. i think that is really astounded. now, as i said, goldwater was a man who responded to change. he responded to the tenor of the time. what you'll find as well, his environmentalism comes and goes. by the late 1970's, he started to retreat. he had a little bit of buyer's remorse -- by the late 1970's. he supported the epa but he was shocked that when it actually began to regulate or regulate in a way he thought was excessive. he began to have doubts. by the 1970's, he was grumbling that maybe it should be eliminated. the sierra club thought his grand canyon proposal was not aggressive enough. they got into a big fight. he quit the sierra club. my files, my favorite, i have is very indignant letter of resignation. he didn't like it when environmentalists opposed the supersonic transport, the american version of the concord. environmentalists were very opposed to it. it would cause climate change. it was overblown. at the time, there was concern. gold

in northern arizona, glen canyon dam has joined hoover dam and conquering the colorado.tial sites in other canyons await the day when they will cradle mighty multipurpose dams. these developments will write new chapters in the story of hoover dam, truly a modern civil engineering wonder. ♪ >> here is a message to congress from one of the student camp competition winners. >> genetically modified tomatoes, corn, and soybeans are probably the most common. >> according to the usda, 90% of all corn and cotton and 93% of also being crops planted in the united states are genetically modified. despite suggestions of noble intent -- >> there is genetically modified rice to treat vitamin a deficiency throughout the world. >> there are people starving in africa and we can get them the food they need, i say why not. >> the safety and nutritional value of gmo;'s is income -- is inconclusive and highly controversial. >> there is no difference if you eat organic food or gmo, as long as you eat fresh. >> who is responsible for determining whether or not gm food should be labeled, band,

in northern arizona, glen canyon dam joined hoover ndamukongering and regulating colorado. potential sites and other dams on the colorado river await the day when they, too, will cradle multi-purpose dams. these developments will write new chapters, truly a modern civil engineering wonder. >>> 200 years ago british soldiers invade washington, d.c. and burned down the white house and capital while president and first lady dolly madison fled the city. this weekend a two-day forum with authors marking british burning of washington and war of 1812 all starting tomorrow at 1:00 p.m. eastern. day two of the conference on war of 1812 also live thursday here on american history tv. the white house historical association and u.s. capital historical society starting 8:30 a.m. eastern time. >> each week american history tv brings you archival films that help tell the story of the 20th century. republican herbert hoover served as president from 1929 to 1933. remembered most for his time in the oval office at the start of the great depression, hoover also served as the secretary of comme

in northern arizona, glen canyon dam has joined hoover dam in conquering and regulating the colorado.otential sites and other canyons in the colorado river await the day when they too will cradle mighty multipurpose dams. these developments will write new chapters in the story of hoover dam,bjgz truly a modern l engineering wonder. >>> each week, american history tv's real america brings you archival films that help tell the>e story of the 20th centur. at the end of 1963, the united states had about 16,000 military advisers in south vietnam, sent to help the army of the republic of vietnam in their war against homey minute and the communist north. next from 1963, a 30-minute u.s. army film documenting the activities of captain william johnston, who trains and assists south vietnamese troops while they are constantly being attacked and harassed by vietcong. 50 years ago, on august 10th, 19 of 4, the situation in vietnam was transformed when lyndon johnson signed the gulf of tonkin resolution with congress granting the president broad powers to increase american involvement in the conf

in northern arizona glen canyon dam has joined hoover dam in conquering and regulating the colorado. sites and other canyons on the colorado river await the day when they, too, will cradle mighty multi-purpose dams. these developments will write new chapters in the story of hoover dam, truly a modern civil engineering wonder. >>> 200 years ago, british soldiers invaded washington, d.c. and burned down the city. this is a live two-day forum with historians and authors marking the history of the burning of washington and the war of 1812. all starting tomorrow at 1:00 p.m. eastern. and day two of the conference on the war of 1812 also live thursday here on american history tv. the white house historical association and the u.s. capital historical society starting at 8:30 a.m. eastern time. >>> each week american history tv's reel america brings you archival films that help tell the story of the 20th century. herbert hoover served as president from 1929 to 1933, remembered most for his time at the oval office at the start of the great depression hoover also seshdrved as the secretary of

canyonver dam and glen -- glen canyon was built in the 1960's. those are large storage dams that regulate the flow of the entire colorado river. what has really impacted since dams --a number of think of them like straws into the river. you think the river is unlimited . parker dam gets built in 1941. it is water through an aqueduct. later arizona wants it's part. serveles to phoenix to those people. dam -- the imperial pulled water out into the all-american canal, the largest canal in the world. you could see it from space. imperial water to the valley -- the coachella valley acres.ves 500,000 it irrigates 500,000 acres of crop land in the imperial valley and coachella valley. see oft amazing thing to the imperial dam are all of these canals pulling water out and what remains of the river. now all of the states are starting to say, who will get what. says the upper basin states which is like wyoming and colorado get 7.5 million acres. the lower basin states which is arizona and california and willa, -- by the way, we give 1.5 million acres. they