everything here it covered in cool vanek ash and rock.verybody in this town 4,000 people have been obliged to evacuate. in fact, authorities have asked some of the people throughout these of the day to check on their animals and clear the roads to their houses. it's really quite amazing the scene here. this ash is very, very thin. you can't see it right now but it's in the air. most people are wearing these masks like this to try to--to avoid breathing disorders. that's one of the things that authorities are most concerned about. but the real problem is we don't know when this is going to end. this explosion, there haven't been any more major eruptions but the seismologists who are keeping close tabs are saying there could be another one absolutely at any time. >> dig deep in london and you'll find more than just dirt. it's an archeological site. jessica went to the site never liverpool street station and took a look down below. >> skeletons of romans living in roman nearly 2,000 years ago found by archaeologists working on a tiny square

senate about jackson vanek that was an amendment that put together the free trade with the soviet union and human rights together, bipartisan support. the administration spoke and he was a great man. the man was my role model, andre saharov who was under harassment ended up in exile who spoke for -- you call it isolation. it's very important that we send this message not to putin. forget him now. it's about his cronies or inner circle or russian bureaucracy or middle class in moscow. they should understand that policies of engagement that enhance dictators with russia will no longer be in place. and the free world will stand behind its values and will think not about putin's russia but the future of my great country. thank you. >> three minutes. >> i was going to begin with a lighthearts remark with saying it would really be fun just to see kasparov and posner go after each other alone. actually, i was in moscow in early march and i was in kitchens where russians had this conversation and representatives of both sides were there. a big debate goes on in russia. but when kasparov that he