Mustard is classified as a "persistent" agent. How persistent? Not a year goes by when a Frenchman or two (and some of his farm animals) doesn't die from plowing up a mustard-gas shell from WORLD WAR ONE.
I did not know that it lasts for decades, thanks for the information. This further dismantle the lie of the Left that this is nothing.
I found this little story:
WWI shells force evacuation of Vimy
Last Updated Sat Apr 14 12:23:06 2001
VIMY, FRANCE - Thousands of people have fled the area surrounding an unexploded weapons stockpile near Vimy, France.
Neighbouring Vimy Ridge was the site of a historic Canadian victory during the First World War. French newspapers at the time hailed the breakthrough as 'The Easter Surprise.' Now the shells used in the battle have brought another Easter surprise - 84 years later.
Evacuating a nearby hospital
An endless flow of fluorescent red rescue vehicles broke the calm in Vimy. Police knocked on all doors in a three kilometre radius around a stockpile of 170 tons of unexploded ordnance.
Most of it contains lethal mustard gas, now an illegal weapon in war.
http://cbc.ca/cgi-bin/templates/view.cgi?/news/2001/04/14/vimy010414