I want to know the answer to the following question:
What is the controversial N.S.A. program used in the U.S.?
All the background I'm provided with is that "Modern ISPs integrate a wide array of surveillance and packet sniffing equipment into their networks, which then feeds the data to law-enforcement/intelligence networks (such as DCSNet in the United States, or SORM in Russia) allowing monitoring of Internet traffic in real time.". Is that enough to answer the question?