(CBC News-Canada) Derek Stoffel - The young Israeli soldiers sitting in front of a bank of computers are logged into Facebook - trying to prevent attacks against fellow Israelis. Inside the command center - called the "war room" - of an army base, members of an Israel Defense Forces intelligence unit sort through thousands of posts on Facebook, Twitter and other social media sites, looking for digital warning signs. "Words like, 'knife, bomb,' stuff like that," said Capt. Y. "That helps us determine who is more probable to commit something." Israel has become a world leader in monitoring social media to try to predict and prevent attacks. Experts say other nations, particularly those in Europe, would benefit by emulating Israel in this respect.