. >>> up in rochester, minnesota, 200 homes now without water because it is so cold, their underground pipes have frozen. plumbing contractors are slammed with calls up there. the waiting lists are stacking up for those in need of somebody thawing out the water pipes. got much more winter storm coverage on the way. we want to let you know that news4 today will begin early tomorrow morning to give you an update on the cold and on road conditions. we invite you to tune in, beginning at 4:00 a.m. >>> deepening tension between the u.s. and russia tonight because of moscow's involvement in ukraine. not long ago, the pentagon announced it was suspending all exercises and other activities with the russian military. this after russian troops allegedly threatened to seize ukrainian warships if they weren't surrendered. president obama says vladimir putin risks isolation if russian forces don't retreat from ukraine. both the u.s. and other allies are considering severe sanctions. the tensions led to a near 1% drop in the stock market today. >>> tense moments and dramatic testimony on the first d

we are joined now by three people on the front lines of the alzheimerss battle from rochester minnesota, dr. ronald petersen, director of the alzheimerss disease research center. in our washington studio, gale hunt, president and c.e.o. of the national alliance for care giving and from chicago, angela, chief strategy officer of the alzheimerss association. dr. fielder sen, we talk add little bit about rest, but help us understand what is it? what is the actual stuff of rest? >> well, rest is a protein that starts to protect the brain. seven against various toxins. so as you indicated many people who live throughout the life span have am lloyd in the brain. some of them become clinically impaired and some do not. it's always been a mystery as to why people with the same amount of this toxic protein in the brain can do well. this study indicates that perhaps this rest protein, is active at different levels in those individuals. so people who have the protein in the brain, but do not become demented may have higher levels of this protein, than individuals who do become clinically impairs a

a chief medical officer, who is the head of sports medicine at the mayo clinic in rochester, minnesota, and the other is the chair of our safety and protective equipment committee. that committee has been existence for 40 years. it is an important group, helping to guide our board in making it decisions. we have a risk management committee, which is concerned with the safety of the playing environment and the surrounding area. in 1999, in cooperation with figures getting we began an organization called serving the american ranks, or dark, which is essentially a trade and education organization for ice facilities focusing on a variety of operational aspects including safety issues in drinks. in the safety of our participants, we positively affect the landscape through three primary areas, education, rules and enforcement, and risk management. education related to safety happens on an ongoing basis in u.s. hockey, and we will use the many avenues to mitigate. we have direct electronic vacation with every single home, every player, and prepared from area official, every comment in our org

a chief medical officer, who is the head of sports medicine at the mayo clinic in rochester, minnesota, and the other is the chair of our safety and protective equipment committee. that committee has been existence for 40 years. it is an important group, helping to guide our board in making it decisions. we have a risk management committee, which is concerned with the safety of the playing environment and the surrounding area. in 1999, in cooperation with figures getting we began an organization called serving the american ranks, or dark, which is essentially a trade and education organization for ice facilities focusing on a variety of operational aspects including safety issues in drinks. in the safety of our participants, we positively affect the landscape through three primary areas, education, rules and enforcement, and risk management. education related to safety happens on an ongoing basis in u.s. hockey, and we will use the many avenues to mitigate. we have direct electronic vacation with every single home, every player, and prepared from area official, every comment in our org