In spite of being on a war footing for almost 12 years, I am constantly surprised by the number of Wg Cdrs, Gp Capts and 1* promoted in the last couple of years who have had incredibly narrow careers - very limited op tours (enough to get the 'tick'), no MB experience, no Joint tours. Without a doubt, breaking out and doing whacky out-of-branch and, worse, out-of-Service tours can be career killers, and in many cases scuppers any chance of becoming Executive Stream, irrespective of the broadening that such tours engender.