As the FBI pointed out immediately after the Boston attack, terrorists are somebody's neighbor, co-worker, friend or relative. It's clear that our safety depends on all of us reporting suspicious activities, regardless of the intimate relationship we may have with the people we suspect. While we don't want to return to the days of the Red Scare, when many Americans lived in fear of being falsely accused of having communist ties, we cannot become complacent. Since 9/11, many of us have become detached from the reality that terrorists continue to organize, train and scheme to harm the U.S. and its people. But there have been more than 50 known terror plots against the United States since 9/11. While counterterrorism efforts have prevented these attacks, the Boston bombings reveal it will take continued effort by all of us to keep our communities safe.