dr charlotte mcshane is a mechanical engineer. tonight what she learnt about tornados. phil torres. i'm phil torres. 'm an entomologist. that's hour team, nout let's do some science. >>> hey, guys, welcome to "techknow", joined by dr ross shimabuku, and lindsay moran. microscopic things have been making news. viruses. take ebola - it caught america offguard. in some places we overreacted and in other places we doesn't do enough. >> there's a lot of scare around ebola, because we don't know much about it, compared to measles. which is also a hot topic. >> when we think of diseases we tend to think of containment. how do we contain them. i had an opportunity to meet a small group of scientists who are seeking out the pathogens in order to understand it. it might surprise people that metropolis. that's good reason for that. let's have a look. >> reporter: we are all vulnerable to the tiny viruses. >> microscopic agents causing big diseases. >> reporter: these infectious agents know now boundaries and in today's hyper connective world, they can move fast. like others, like small pox are

. ♪ >> that same year he marys tracy mcshane after proposing with his own creative flair. >> one of his is puzzle editor at the new york times and jon decided a neat way to propose to tracy was to have will devise a crossword puzzle and the answer was will you marry me? the couple now have two kids and lead a private life away from the limelight, but on air stewart was all business taking on the country's leaders with hilarious and outrageous rants. >> will you pull a bait and switch, sir, and enslave the white race? is that your plan? >> two weeks into your term and we catch you eating pizza? and even taking on newsmakers. >> if fox was high msnbc must be msnbsad. >> and those microdroplets can infect me, they can land on surfaces and i can touch them and they can infect me. >> no! >> i think jon stewart is a check and balance. he's a check and balance on politician, on the courts on congress and especially on the president, but he's also a check and balance on the media on us, in the press. >> his no filter, in your face approach brought an untapped audience to news. >> he has an appe

>> are just joins us -- our guest joins us from -- we have leo mcshane -- leo shane and craig whitlock. >> it seems there is new momentum to consider supplying weapons to the government of ukraine, although that is something the obama administration and its european allies have resisted for a while. where do you stand on this? craig:rep. smight: -- smith: it is pretty clear the strategy russia has employed. they are going to try to militarily engage in companies underneath the surface, so it doesn't appear they are actually engaged. they will use third parties, bring their soldiers in in ways that we cannot see. certainly, they did that in crimea. now they are doing that in eastern ukraine. we want crane to be independent. if this works for russia and ukraine, there are a lot of russian speaking people in other countries around there. estonia, poland. where does russia stop? when you read the rhetoric coming out of the highest levels of government in russia, it is not encouraging. we have to help ukraine stop this before it spreads. we have to show russia there will be a high price to

. >> are just joins us -- our guest joins us from -- we have leo mcshane -- leo shane

from you ♪ ♪ connell: welcome to the best of "imus in the morning" from new york city i'm connell mcshanefrom our studios in midtown manhattan. it's good to have you with us this morning we'll have the journalist and author jim lehrer to get us started, in fact the first two interviews today deal with the jfk assassination. jim lehrer was anchor on pbs for many years but he's also been the author of a number of best-selling novels. his latest starts with a premise that's true, lehrer was there on the day president kennedy was assassinated