The surviving suspect in the Boston Marathon bombing is in hospital, and under heavy police guard.<br /><br />Dzohkhar Tsarnaev was badly injured during a late-night shootout before his capture.<br /><br />Massachusetts state police have released these thermal images of the 19-year-old suspect - as he hid in a boat in the backyard of a Watertown House.<br /><br />Al Jazeera’s Cath Turner reports from Boston.
