Home-made bomb injures 22 on packed London commuter train

By Kevin Coombs and Yann TessierLONDON (Reuters) - A home-made bomb on a packed rush-hour commuter train in London engulfed a carriage in flames and injured 22 people on Friday in Britain's fifth major terrorism incident this year, but apparently failed to fully explode.Passengers heading into the British capital fled in panic after the blast as the train was about to depart Parsons Green underground station in West London at 8.20 a.m. (0720 GMT).Some suffered burns and others were injured in a