File photo dated 12/03/13 of a general view of a man smoking a cigarette as a million former smokers in the US took up the habit again after 9/11, new research has shown. They were driven back to ... more 
File photo dated 12/03/13 of a general view of a man smoking a cigarette as a million former smokers in the US took up the habit again after 9/11, new research has shown. They were driven back to tobacco by stress, experts believe. less 
1 / 25
Press Association Images
Fri, Jun 21, 2013 8:53 AM EDT