Traditionally, the workplace has been thought of as a safe environment, the place where we often spend more time with our co-workers than our own families.

But that perception changed dramatically on a hot August day in 1986, when a postal worker in Edmund, Oklahoma walked into the post office with a mailbag containing the usual assortment of sales circulars and utility bills, right alongside three hand guns and 100 rounds of ammunition. Ten minutes later 17 co-workers were dead, the shooter had killed himself, and a workplace where the greatest danger up until that moment was probably a sore back from lifting a mailbag, was now the site of what has become an alarming trend across the country. read more »