the nsa, as you no, not allowed to spy on americans and senior u.s. intelligence official tells evan peres the location program, the one reported on, is focused on foreign targets. and the nsa says it does not intentionally target american but was the whereabouts the phones of some americans overseas and some in the u.s. could be collected inadvertently in these operations. a senior u.s. official tells perez they try to minimize that when an innocent american's cell phone's location is collected they try remove that from the database as soon as collected. they're trying to minimize and avoid targeting innocent american's cell tones. >> what does the nsa do with the information? >> it's intent to find co-travelers, people who might be traveling with or meeting up with people they're surveilling. unknown associates, not known at