A FRENCH police officer has become a national hero after he was killed when he exchanged himself for a hostage held by an Islamic State gunman.http://www.heraldscotland.com/NEWS/16114597.__39_He_gave_his_life_so_a_stranger_could_live__39__France_mourns_hero_police_officer_who_died_after_exchanging_himself_for_IS_hostage/?ref=rss