clif power stations but with growing environmental and safety concerns the sun may be setting on nuclear energy as we know it so many sis from around the world have come to discuss a possible shift away from nuclear fission. there are currently one hundred eighty five nuclear power plants in europe and another seventeen all the way france has almost a third of the total with fifty eight plants producing seventy eight percent of the country's energy needs only stations have produced well over one million cubic meters of radioactive waste ninety percent of which is stored in three facilities this is where nuclear fusion comes in almost the difference. nuclear fission isn't normally found in nature it's the process by which heavy elements split to form lighter elements and has been created by mankind to make post stations a nuclear bomb. typical reaction a neutron hits isotope which caused it to destabilize and splits into small elements and neutrons coming off energy unfortunately it's also uses a large amounts of radioactive waste which is incredibly hard to dispose of safely nuclear fusi

stormy, wet weather in the winter of 1997-1998, when so much rain fell rivers overflowed and saturated clifs gave way. el nino develops when the pacific ocean near the eqaitdor warms and pulls the jet stream south. meteorologist professor john monteverdi: >> if that stays fixed which it can did in 97-98, through november through march, then we get storm after storm after form. >> reporter: we could use that, right? >> we could use it. >> reporter: but california could be disappointed. not all el ninos are equal. the warmer the ocean, the stronger the el nino. >> the caution is some of our indications indicate a weak el nino, and some also indicate a strong el nino, but most indicate a moderate el nino. >> reporter: a moderate el nino is less likely to break california's drought but whale watchers in southern california have seen indications that the ocean is warming perhaps more than climate models sitting. alisa schulman-janiger organizes an annual whale census. >> this year we're seeing warmer temperature asks at least three species of whales we don't actually see. we should have a very in

6th of june, 1944, 225 rangers jumped off the british landing craft ask ran to the bottom of these cliffings. their mission was one of the most difficult and daring of the invasion, the climb these sheer and desolate cliffs and take out the enemy guns. the allies had been told that some of the mightiest of these guns were here, and they would be trained on the beaches to stop the allied advance. the rangers looked up and saw the enemy soldiers at the edge of the cliff shooting down at them with machine guns and throwing grenades, and the american rangers began to climb. >> this weekend american history tv will mark the 70th anniversary of the d-day invasion of normandy, saturdaying at saturday morning -- saturday morning at 10:30 eastern. that's followed at 11:30 by author and historian craig simons discussing his new book, "neptune." and at 12:30 mr. simons will take your questions and comments live. and at 1:30, a look back at presidential speeches commemorating the day. all on american history tv saturday on c-span3. >> now, nsa director ask cyber commander admiral mike rogers on cybersec