As a quent consequence the authorities here in geneva raised the alarm. and the headquarters of the united nations we are seeing for the first time in a long time the u.n. security guards wearing bulletproof vests and holding machine guns as we ve seen done in cities where the terror threat alert was raised in the last few weeks, for instance in brussels. but the threat is still not very specific. it s not like the authorities are not saying they averted a specific attack. it s more like they are being cautious. the threat rate was raised from two to three out of a maximum of five. nevertheless, u.s. citizens are being warned to be cautious. a post purportedly from the hacking group known as anonymous has declared today the isis day of trolling devoted to
Both in the radicalization of young people to join military groups. reporter: u.s. military over a hand full of times in the last decade, twice in 2003, again after the bin laden rate. and on the 10th anniversary of the 9/11 attacks. in all cases civilian levels were put at a higher threat rate. in military installations around the country. the military concerns in isis, the military taking this very seriously. jim sciutto, cnn, washington. an american doctor who was declared ebola-free after contracting the virus still had the disease in his eye. we ll have that story next. plus, a rare look inside north korea s schools where children are taught a twisted version of history. and loyalty to their leader comes above everything else. a g. and aveeno®. [ female announcer ] only aveeno® positively radiant
But many canadians used to a quick hop on and off seem philosophical. we live in a world where it s necessary. i think that s sort of the feeling of most people. we would rather have the security there than not. reporter: meanwhile, the joint team of canadian agents will be watching discreetly for terrorists and other threats from this command center. the threat rate now is at a low. and there is absolutely no known threat to the olympic games. reporter: let the games begin. but with hundreds of electronic eyes on land, sea and in the air just in case. david, the challenge is always to make the games safe and secure without sacrificing the fun of it. the spirit of the games. canadian officials tell us so far they re very confident that they ve gotten that security footprint just right. so i don t think we re going to see a lockdown of any kind unless that security level, that threat level changes significantly. back to you. jim, thanks for the report.