"U.S. sailors finally banned from smoking on submarines (though some will be allowed to light up on deck)"
Amazing it took so long. I imagine it was kind of tough before on the folks who didn't smoke, no matter how good the air circulation was.
Read more: http://www.dailymail.co.uk/news/article-1343689/US-submarines-smoking-ban-comes-force.html#ixzz1fjtRTFgC