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Re:Getting Bin Laden: What happened that night in Abbottabad by bdunbar on Monday August 01, 2011 @03:19PM (#2833916)
Chain-link can be taken down and moved quicker than a standard wall.

This used to be an important factor when you didn't want 'stuff' to be seen by satellites, needed to setup and take things down quickly.

I don't know if it's still a factor today.

Re:Getting Bin Laden: What happened that night in Abbottabad by runjake on Monday August 01, 2011 @07:44PM (#2835040)
It's not. And modular walls are quicker than chain-link. Army SF commonly uses framed plywood walls with locking, thick metal drop hinges on each side, roughly how a ranch gate works.

They're modular so that they can be quickly re-arranged, not to hide from satellites.