french foreign prime minister manuel valls called for greater coordination today, before traveling tos. >> ( translated ): we closed our eyes-- everywhere in europe including france-- to the progression of extremist ideas, neighborhoods which through a combination of drug trafficking and radical islamism, perverted youth. and i'm not here to lecture the belgians, because i'm sure they're more than aware of this. >> reporter: there was also word that secretary of state john kerry will travel to brussels on friday, to meet with top belgian and european officials. and tonight, european and iraqi intelligence officials told the "associated press" that isis has dispatched at least 400 fighters to europe, specifically trained to attack the west. judy? >> woodruff: malcolm, given the threat of these fighters, give us the sense of the security across europe. you traveled into belgium today. >> reporter: yes, i've come from less bowes in greece, and traveled through paris, and all the way you can see how sensitive people are in the wake of these attacks at transport hubs. at athens airport, fo