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tonight, health care on trial. it was the final day of dramatic supreme court hearings on the president's controversial health care law. now, justices again signaling a huge divide, a chasm that could doom obama's signature domestic achievement. with all uncertainty surrounding the law's fate, business owners are looking at how their costs will be affected and that means yours, if you're an employee. for some clarity, we turn to our strike team made up of entrepreneurs, innovators, ceos of companies of all sizes and our team members agreed their costs would go up but the big question...

tonight, health care on trial. it was the final day of dramatic supreme court hearings on the president's controversial health care law. now, justices again signaling a huge divide, a khasm that could doom obama's signature domestic achievement. with all uncertainty surrounding the law's fate, business owners are looking at how their costs will be affected and that means yours, if you're an employee. for some clarity, we turn to our strike team made up of entrepreneurs, innovators, ceos of companies of all sizes and our team members agreed their costs would go up but the big question...

And, then... >> jamie: that would be me, doc, nobody believes you! >> and all this week i have been taking b 12, so, listen, eric -- no, i beg your pardon. >> jamie: mary, whatever it is. the thing about b 12 that i think is interesting, there was another line of research we had that said if you have a low level of b 12 you can have -- ready for this, folks, brain shrinkage. your brain can shrink. who wants that, doc? really? >> i don't. i don't know, there may be who would like to have a smaller brain. >> jamie: you could get smaller hats but, b 12 could prevent that. >> you can get lots of b...

Effectively disengaging or blocking off what interrupted them and returning to the task beforehand. so in essence, a switching of the networks in the brain seems to be less effective in older adults. >> and this all involves short-term memory, correct? >> yes, this is the information that you are holding over 15 seconds in this experiment, and relates to a common experience in our lives that we might leave the couch with a clear idea of what we want to get out of the refrigerator only to arrive there and find out we have no idea what we are doing there. and a lot of people have probably experi...

>> we hardly ever get to report something positive or big in the world of alzheimer's, as much as we've tried. but this idea that you really couldn't be sure if someone had alzheimer's until the time of death. that could be changing. we're talking about a spinal tap. it's a study that just came out today, taking a little bit of the cerebrospinal fluid. they've looked at people with mild memory problems and the people who had alzheimer's, this test came back positive most of the time. the people who had mild memory problem, 75% of them had the test come back positive and all of those people wen...