Constitution Corporate Credit Union in Wallingford, a &amp;#8220;bankers&amp;#8217; bank&amp;#8221; for the state&amp;#8217;s retail credit unions, went down in flames on Friday, falling to a government seizure caused by the failure of its investments in mortgage backed securities. Like so many financial firms that got burned, AIG, Lehman Brothers, Citi, et al, the local corporate chased [...]