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Accomplishment. this is a strong visual image of our resilience coming back of this terrible tragedy. >> that's a clip from the pbs nova documentary ground zero super tower that airs tonight. you saw david chiles. he is design partner at som, the group that designed this tower behind us. good to see you this morning. >> good to see you. >> there is so much talk and controvercy about why it took so long. you heard it all. i don't have to remind you. you said i am surprised it came up this fast. >> underground from grade to bedrock, 80 feet. that's the most complicated building down here. the ac...

Tyson's new pbs nova documentary "the pluto files." dr. tyson is the guy who killed pluto. that is, it was dr. tyson and his team at the hayden planetarium at new york city who decided ten years ago to not call pluto a planet anymore and instead classify it as part of a distant asteroid belt. instead of remembering the planets by memorizing my very excellent mother just served us nine pizzas mercury veinous earth mars jupiter saturn uranus neptune pluto. you instead have to memorize my very excellent mother just served us nachos. no more pizza. no more pluto. for being the first physicist to r...