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At 10:04 a.m. on 9/11, after Tower Two had collapsed, a member of the New York Police Department's Aviation Unit warned that the top 15 floors of Tower One were "glowing red" and might collapse. Four minutes later, a helicopter pilot said he did not believe the tower would last much longer.
Can't you people just come together as a nation so we can fight these extemists as a NATION - AS ONE? There are plenty of other conspiracies out there to be concerned about.
It is ludicrous to imagine an entire section of the Tower glowoing red!! Silly. Even if it turns out that some cop did say that, it says more about his abilities to percieve reality than it does about the color of the building. There are plenty of photos of that scene, and none seem to show any discoloration except where the thermate is cutting thru corner sections.
NYPD Aviation Units: Minutes after the south tower collapsed at the World Trade Center, police helicopters hovered near the remaining tower to check its condition. "About 15 floors down from the top, it looks like it's glowing red," the pilot of one helicopter, Aviation 14, radioed at 10:07 a.m. "It's inevitable."
Seconds later, another pilot reported: "I don't think this has too much longer to go. I would evacuate all people within the area of that second building."
10:20 NYPD – Aviation 14 states the WTC 1 is leaning
Federal engineering investigators studying the destruction of the World Trade Center's twin towers on Sept. 11 said New York Police Department aviation units reported an inward bowing of the buildings' columns in the minutes before they collapsed, a signal they were about to fall.
According to Shyam-Sunder, the concave bowing of the steel was seen on the sides of the towers opposite where the planes hit them. At 10:06 a.m. that morning, an officer in a police helicopter reported that ``it's not going to take long before the north tower comes down.'' This was 20 minutes before it collapsed. In another radio transmission at 10:21 a.m., the officer said he saw buckling in the north tower's southern face, Shyam-Sunder said. Source
Electron beam welding (EBW) is a fusion welding process in which a beam of high-velocity electrons is applied to the materials being joined. The workpieces melt as the kinetic energy of the electrons is transformed into heat upon impact, and the filler metal, if used, also melts to form part of the weld. Pressure is not applied, and a shielding gas is not used, though the welding is often done in conditions of a vacuum to prevent dispersion of the electron beam. The process was developed in France and released on November 23, 1957 in Paris by J. A. Stohr. German physicist Karl-Heinz Steigerwald, who was at the time working on various electron beam applications, perceived and developed the first practical electron beam welding machine which began operation in 1958.
As the electrons strike the workpiece, their energy is converted into heat, instantly vaporizing the metal under temperatures near 25,000 °C.
However, attempting to weld plain carbon steel in a vacuum causes the metal to emit gases as it melts, so deoxidizers must be used to prevent weld porosity.