the east building to the national gallery of art, and the building was designed by the architect i m pei. the artist, alexander calder, created this incredible mobile that hangs above. in the original design, it was going to be made of steel, but that would have been too heavy to move freely in this space. paul matisse, who was an artist and engineer, worked with mr. calder in order to develop a design that was much lighter. and the final mobile only weighs 920 pounds, which is much lighter than the miro tapestry that also hangs in this space. in the late 1980s, it was actually necessary to remove the mobile from the space. girl: why did they have to take it down? richard: because it needed conservation treatment. not only had dirt accumulated on the surface, so we had to clean the work, but, in addition, there are parts where the metal is moving against metal, and this was actually causing some wear. the conservators had to use a special technique in oer to repair these worn areas with new metal. after that was finished, then those areas were painted so that it matched the rest of the m

in new york pei-shen qian used works of art like this untitled painting by jackson pollack, and copied them. with collaborators in spain acting as sell e the ring made $80 million selling the fakes, making it an exteriored art swindle. how did he do it. how do we know what is real and name in museums. with me a man with some answers. ken perenyi, an art forger who made a fortune fooling experts into believing that his paintings were works of masters. good to see you. >> thank you for having me here tonight. >> can you tell me how you got into this? >> well, i didn't really plan a life in the art world. i just - just a chance meeting with artists from new york city, introducing me to pointing and the museums and the gallery scenes in new york. i wanted to try my hand at it, and fit in with new friends and discovered i had a hidden talent to paint pictures. it was when i was about 17, 18. >> painting pictures is one thing. passing them off as the real thing is different. did you feel like you were doing something wrong? >> not really. i felt that it was a contest of wits, to pit my skill

pei, it's a national treasure here in our midst where president kennedy's legacy lives on. today we are marking an especially important occasion because this gathering is a very first event co-sponsored with our new neighbor, the edward m. kennedy institute for united states senate. i can't think of a more fitting occasion for the institutions that honor the lives and achievements of both president kennedy and senator edward m. kennedy. it also seems fitting that you begin a conference about tackling a very big problem in our country here in this monument to a president who, along with his brothers, believed deeply in our government as an essential force for good who had such extraordinary optimism and confidence in america and who believed that working together americans could do big things. we could go to the moon. we could launch the peace corps, which they did by the way within six months of the new administration. and we could even achieve a nuclear test ban treaty. it's worth noting that in 1962 70% of americans said that they trusted washington most or all of the tim