dr. henry kissinger, who will introduce our guest of honor, the vice president of the people's republic of china, vice president xi. [ applause ] >> mr. vice president, distinguished guests, when the premanner i concluded the communique that announced the secret visit to beijing, the premier said this announcement will shake the world. and even we could not imagine at the time the tremendous implications of the opening of relations between china and the united states. for 40 years through eight american administrations and five generations of chinese leaders, china and the united states have worked out an enormous series of problems. of course representing different cultures. and in some respects domestic value systems. there have been occasions of disagreement. but the significant aspect is that the two sides have always found a way to understand the complexities and challenges of the other and that they have moved forward through extraordinary alteration of international events. they have been honest with each other. and they are now entering a new period. never before have so many chang

dr. small on new developments in understanding alzheimer, henry kissinger understanding vladimir putin and david agus on the end of illness when we continue. funding for charlie rose was provided by the following: captioning sponsored by rose communications from our studios in new york city, this is charlie rose. >> rose: major new developments in alzheimer research could have a significant impact on our understanding and treatment of the disease. for the last 25 years researchers have been confounded by this central question, does alzheimer start independently in vulnerable brain regions at different times or does it begin in one region and then spread to connected areas. two new independent studies at colombia and harvard now provide an answer. they indicate the disease can spread from brain cell to brain cell like an infection. dr. scott small of the talk institute for research from alzheimer disease and aging brain at columbia university medical centre joins me now. he is a co-author of the columbia study. i am please to have him here. we have talked before about the brain series so it