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>> older students sing the national anthem at an outdoor rally, mixing peers and patriotism. experts say americans should expect a jump in the national anxiety level. >> theyre gonna be irritable, they may be really, very acutely aware of their environment around that and any kind of threat around them. >> also tonight some of the first effects of the fear in the economic fashion, already today, there has been problem with gas gouging, prices have gone up to as >> much as $5 a gallon. tom? nbc r...