NBC News say these steel bollards were "sawed through", but there appears to be oxy-cutting slag on the cuts, especially on the far left (above)
The cuts appear too ragged in many parts to be from any type of saw - although the bottom section on the right does appear fairly clean - it still has some slag on it.
NBC News says:
https://www.nbcnews.com/politics/im...-border-wall-showed-it-could-be-sawed-n956856
The photo above seems to just be a concrete filled bollard, with maybe 3/8" steel, and it has been cut. But it seems misleading to say it was simply sawed through. It seems more likely it was done with a combination of tools. Perhaps oxy cutting was used to create the initial hole, allowing the concrete to be chipped away, and a saw inserted.A photo shows that the steel columns were breached with a common industrial tool.
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A photo exclusively obtained by NBC News shows the results of the test after military and Border Patrol personnel were instructed to attempt to destroy the barriers with common tools.
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"While the design currently being constructed was informed by what we learned in the prototypes, it does not replicate those designs," said Waldman. "The steel bollard design is internally reinforced with materials that require time and multiple industrial tools to breach"
Oxy cutting sounds like it would need heavy equipment, but you can actually make a fairly cheap and light DIY version of a thermic lance, like this one by @NightHawkInLight
Source: https://www.youtube.com/watch?v=EA-VCaBUsCA
My own experience of cutting steel with "industrial tools" is from using an angle grinder with a cutting disk, and from using a reciprocating saw with a tungsten carbide blade. Both of these were on cheap battery-powered mobile tools.
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