u.c. berkeley injured several people, but a victim says she's waiting for answers. >> u.c. berkeley, september 30, 2013. a power outage and two hours later an explosion. >> i felt intense heat and when i turned around i saw large flames shooting out of the pavement. >> elainea, an artist was a grad student on that day and she's telling her story to ktvu. >> it was terrifying and painful. i had second-degree burns on all the skip that was exposed to the blast. since the blast was behind me was the back of my neck and the sides of my hands. >> at first the university blamed vandalism. >> unknown individuals were stealing copper grounding wire. using heavy equipment to pull it out of the group. >> six weeks after the vault exploded, the chancellor wrote this letter stating that after further investigation copper theft was off the table. the evidence gathered to date indicates this switch shorted while restoring power to the campus. >> the school wanted to downplay the seriousness of the event. >> it is frustrating, there's other switches like that one in several places on campu

u.c. berkeley police nearly seven hours later. at 2:45 friday morning. >> it is a little bit alarming. >> rachel said she carries pepper spray and walks alone sometimes but only in certain areas >> i tend to stick to mainstream areas where i know there will be a lot of traffic in terms of people. >> i always call if i'm walking alone because i feel unsafe. >> u.c. police say this is the seventh sexual assault this year, up a bit from last year. in berkeley, laura anthony, abc7 news. >>> this morning a 16-year-old boy from berkeley remains in critical condition after being beaten on the street earlier this week. the victim's mother tells abc7 news her son was the victim of bullying. she said police arrested six suspects, four adults and two minors in connection with the attack, but for some reason the adults were released three days later. police will not say if the minors that were arrested were let go, as well. the victim's mother said her son witnessed an earlier fight and was bullied by some of the people who were fighting. >>

u.c. berkeley police nearly 7 hours later. at 2:45 friday morning. >> it is a little bit alarming. >> racial -- rachel said secrecy pepper sprays and walks alone sometimes but only in crowded areas. >> i go where i know there will be a lot of traffic in terms of people. >> i always call if i'm walking ag lone because i feel unsafe. >> uc police say this is the seventh sexual assault this year, up a bit from last year. in berkeley, laura anthony, abc7 news. >>> this morning a 1r5-year-old boy from berkeley remains in critical condition after being beaten on the street earlier this week. the victim's mother tells abc7 news her son was the victim of bullying. she said police arrested six suspects, four adults and two minors in connection with the attack, but for some reason the adults were released three days later. police will not say if the minors that were arrested were let go as well. victim's mother said her son witnessed an earlier fight and was bullied by some of the people who were fighting. >> he was asked to choose a si

u.c. berkeley took part in the million student march. they are demanding free tuition, and all student debt be wiped clean. they put their loan amounts on posters. >> in order to provide for our people, we have to support ourselves and we can't do that if we're in debt for the rest of our lives. sanders said higher education could be subsidized by a tax on transitions on wall street the only way anyone would take the dehand seriously is -- demand seriously is if a million of them marched. michael middleton he'll his first news conference after accepting the appointment. he has worked as a civil rights attorney and retired as deputy chancellor from the university. >> we must face many uncomfortable issues that once confronted will make us stronger. he replaces tim wolfe who resigned on monday. racial concerns among students forced the resignation at a top administrator at a small california college. mary spell man is stepping down in eastern los angeles county. students called for her resignation saying her office did not do enough for st

u.c. berkeley's seismological laboratory. he's been studying studying the cascadia fault - where the juan de fuca plate gets stuck up against north america. >> and it buckles the top of north america. more and more until the strain is built up and then it just pops. >> and when it pops, that shaking will be felt in the entire region. to understand the fault's tectonic structure, allen is part of a multi-year study called the cascadia initiative in which scientists have placed seismometers along the ocean floor. using data collected, he's put together the first 3d maps of the cascadia. >> this blue feature is the slab that's diving down. what we see beneath cascadia is a somewhat fragmented slab. so we suspect that it's the fragmentation of the slab that results in very few small magnitude earthquakes. >> so, the good news is... no small quakes. but the bad news is... the cascadia only has large magnitude earthquakes -- which happen every 300 to 500 years. the last time the cascadia ruptured was in 1700... it's now 2015, meani

u.c. berkeley took part in a nationwide rally. the million student march. they are demanding free tcu, -- tuition. students wrote their loan amounts on posters. >> in order to do what we provide for our people. we have to support ourselves. we can do that and be in debt for the rest of our lives. it was inspired bernie sanders, he said higher education could be supported by a robin hood tax. the only way anyone would take the demands seriously is if a million of them marched. >> bernie sanders and his campaign facing tomorrow's debate as his best and possibly last chance to slow the momentum of hillary clinton. the debate will be at drake university in de moines, iowa. on stage will be hillary clinton. bernie sanders and martin o'malley. hillary clinton is 20 points up on bernie sanders. >>> the officials of hayward are celebrating the grand opening of a hill a health clinic on the grounds of a fire department. the idea is to provide people a medical clinic they can go to when they have a nonemergency health issue instead of calling 911. the officials expec

you have to have a great founder, a fantastic university -- stanford being the anchor, berkeley, u.c.e all part of the ecosystem -- and then you have to have the venture capital where risk is rewarded. the more entrepreneurs you have, the more venture capital attracted and the more great companies that start. you start an almost ecosystem and very hard to create. >> rose: do you worry somehow there is the seed within the tech world today for overheating and a bubble that would burst? >> sure, i do. when i was at ebay, we lived through the 2001 bubble that burst. frankly, ebay was fine because we had real revenues and real profits and our market cap went down a bit and we just kept on n going, but you see a lot of very high multiples, young companies today. so i worry about it, and you've seen a pullback in the last six to eight weeks. you've seen a pullback in the valuation of some of these younger companies. so the multiples have gone down. you know, we'll see. i think the business is there is enough people who lived through 2001 who know what can happen. >> rose: who raised the ques