data, ifve sensitive you have a system that powers something important, you have everything from your everyday activist trying -- everyday hacktivist trying to deface your website for a purpose they believe important to criminals which is the majority of what people deal with all the way to nationstates trying to gain access to either sensitive information or trying to be in a position where the of the structures held at risk. monday night :00 eastern on c-span two. -- night at 8:00 eastern on c-span two. c-span visiting national constitution center in philadelphia were asked folks what it means to be american. when you feel like you're at home so you can your comfortable to live here. >> for me, what it meant as i was blessed to have been born in , one of the countries with the most freedoms for people. pursue people to happiness and life. enjoy with your family. >> freedom to pursue your dreams and opportunities. friendship. getting along with everybody here in america. family and love. theimply doing responsibilities both civic and family and every thing like that. membersghter of

metro officials warning people, if you use a wheelchair, ifve y baby stroller, you have to use the elevator. it was on this escalator that a man in a wheelchair lost his life. he tumbled backward. metro is reminding riders that they need to use t elevator. no one swe spoke with has ever heard of this before. karen uses what she calls a roll-ator to get around. e uses the elevator to get down into the station or she can get out of her chair to stand on the escalator. she said elevators can be unreliable but in this case the elevator was working. >> i don't know what they can do. in some places, the escalators are not working and the elevators are not working soo what du do? >> metro says the man who has not been identified waited only 14 seconds for the elevator before going to the escashtor. empathizes with the man who died. she said you don't know whatine was thi when he made deadly thinking. >> my thought is he was rushing to catch a bus. >> chief safety inv will to get the word out on how ill advised it is. sameoes for strollers while we're on the esubject. us the elevator always. disabl