"We have to understand this threat and people seem to have forgotten 9/11," he said. "People don't understand that there are thousands of young people all over the world who are motivated by this radical brand of Islam, which is our enemy."
McCain recalled that 9/11 could have been prevented if the government had the ability to monitor communications.
But he said that he believes Congress and the American people can have a debate about NSA monitoring and come up with a system that has the right "balance."
Read the full story + video at FOXNews.com