about these security preparations
 

Okay, the Homeland Security people want us to get plastic and duct tape in case we are attacked with biological weapons, but I am not sure I understand.

If I seal off my house, or just one room with plastic, so that no contaminated air can get in, what am I supposed to breathe?

Would it not make more sense to just take a plastic bag, put it over my head, and secure it with duct tape? Would be faster anyway.

yes but that wouldnt require as much duct tape or plastic. you need to buy a bunch to do a whole house. thus, stimulating the economy.

I am thinking this advice is being promoted by 3M

... it´s all war propaganda ... well, let´s hope it is ...