Haystack Approach News Today : Breaking News, Live Updates & Top Stories | Vimarsana

At a very young age. is that what the starting point was? >> yeah. so, our studies often start using a classic genetic approach where we find a family somewhere in the world who has a very severe and easily identifiable form of hair loss. in this case from one generation to the next. and we basically take a needle in a haystack approach. we look across all the chromosomes for a place where we see that everyone shares the same gene. then we go in, identify that gene, and find a mutation or a change in the gene that's responsible for their hair falling out. in this case, what was very interestin...

People. >> good people. can we bottle that? police watched over the event but didn't make any arrest. recent flash mob incidents in philadelphia have turned violent. turning the page now, mixes revies for a new tsa plan to keep the skies safe from terror. the tsa dropping its mandatory screening of all passengers plying into the u.s. from 14 specific countries. instead it will now single out flyers for extra screening based on a combination of physical description, travel patterns and other intel-based factors. joining me live is nbc terrorism analyst evan kohlmann. thanks for being with us....