See my conservation of energy argument elsewhere on this page. It's just high school physics to demonstrate that, to quote the head of NIST during the first NIST press conference after 2001/9/11, "a building cannot undergo progressive collapse at free fall".

See my conservation of energy argument elsewhere on this page. It's just high school physics to demonstrate that, to quote the head of NIST, "a building cannot undergo progressive collapse at free fall".

See my conservation of energy argument elsewhere on this page. It's just high school physics to demonstrate that, to quote the head of NIST "a building cannot undergo progressive collapse at free fall".

See my conservation of energy argument elsewhere on this page. It's just high school physics.