Placemark. Goodnight All. Stay safe and ever vigilant.
Since 9/11, I've kept disposable N95 respirators stashed around (car, purse, kitchen) to grab just in case I pick up on a suspicious scent such as the odor of new mown hay, green corn, something fruity, or camphor, as described in this old FR post called "Nuclear, Chemical, and Biological Warfare Risk Information"
http://www.freerepublic.com/focus/f-news/559320/posts
Although they won't provide the protection that a gas mask will, they may get you to the nearest exit. Bill Frist recommends these masks.
I also keep generic Betadine in case of nukes. This is an alternative to potassium iodide pills as described in this link from Jill's site:
http://www.homelandsecurityus.net/what_to_do_with_less_than_3_days.htm