the latest about stepped-up security in belgium we are joined now via skype from brussels by matthew dalton. he is a reporter with the "wall street journal." on the streets of belgium, where are these troops and and why? >> thaerpt positioned throughout the city in certain strategic places around government buildings, ministries, and the reason is because of this plot that was disrupted on thursday evening. the plotters wanted to kill policemen. that was the purpose of their plot. they had police uniforms. they had explosives. they had guns. it was more than 13 people involved in the plot. it was a fairly sophisticated, ambitious effort to try to kill people, kill policemen on the street, and in police stations. so they're not-- they believe that they've rounded up the plot-- they've rounded up all the plotters but this is more of a precautionary effort to make sure that if they've missed anybody, that they have enough firepower in place to fight them. >> sreenivasan: how is it affecting the mood on the street to see this military presence, to hear about these raids happening? what are peop