i was in total isolation. 0n the campus of the university of ghana, i am meeting up with dr robert amed walter pimpong. they are both experts on the trokosi practice. they have spent their lives raising awareness of the abuses that go on in the shrine. sexual servitude was common, and many women will bear the children of the priests. i was liberated before puberty, so i didn't have to go through this. but i wanted to know why someone would serve time for another person's crime. it is believed that they have a right to select any member of their family to serve in the shrine, whether that person committed a crime or not. by the collective principles, they believe they are doing the right thing. when i left the shrine in 1997, there were about 5,000 trokosi women and children in ghana alone. thousands were liberated and trokosi was made illegal in 1998. but no priest has ever been prosecuted, and the practice still goes on. i meet back up with richard, the uber driver whose grandmother is still living as a trokosi. she is one of the few who became a trokosi after she married and had chil

am not hearing it. we are allowing the same kind of social disintegration to happen and we are not realizing it. many of you may know dr. robert he wrote a harvard, book about 20 years ago. about the disintegration of our communities and how since the late 60's early 70's there has been a steep and steady decline in our participation in volunteer activities. that could be anything from sports, city participation in party activities, the pta, unions, religious activities across the board. it's not just a political problem, it's a fundamental society problem, people are not collecting the way they once did. first, people move further away from one another so it took more work to have conversation and sometimes conversations are sloppy when you have different opinions you will but hits. whereou are in a network you have to depend on one another you learn to develop and exercise -- that enable you to respect your friends while being on the same team. technology, to -- tv had a big impact on our participation in volunteer activities. we would come home and watch tv instead of going out of laying baseball. generational shift towards

robert malice. i have a question. i am sorry but this new format has thrown me a little bit. if i may ask the engineers and mr. green or dr. green a question. going back to the first question of this session what happened , with the seismometer that caused the two year delay? and for dr. green, did nasa at some stage consider canceling this mission? >> dr. green is no longer in the house. >> i was very involved in both those processes. the thing that caused us to delay the launch in 2015 was a problem with the seismometer. they are kept in a hard vacuum inside a spherical cavity. but you need to be able to get the signals in and out and the power in and out through that cavity and so we have feedthroughs. one of those was not capable of maintaining itself under temperature extremes. when we tested it at mars conditions going down 100 , degrees celsius, it developed a very tiny crack and began to -- started leaking, allowing air in. a small leak. i calculated once that if you had a leak in your tire, it would take 50 years to see a one psi difference. this was enough to upset the apple cart in terms of the sensitivity of t