just another day in the District - mustard gas & exploding mail boxes

http://www.washingtonpost.com/wp-dyn/content/article/2009/08/12/AR2009081202312.html?hpid=sec-metro

http://www.myfoxdc.com/dpp/news/local/081309_mailbox_esplodes_in_dc

Isn't it about the season for the manholes to start blowing up?