More Americans are turning to radical Islam , some counterterrorism experts say . National security secretary : This is a ` ` paradigm shift '' since the time just after 2001 . Counterterrorism officials believe that interactive online social media sites and a new generation of charismatic English-speaking preachers have helped al Qaeda and other terrorist groups spread their ideology into the United States like never before . Times Square bomb suspect Ali Shahzad allegedly trained in Pakistan . His case is similar to that of Bryant Lane , subject of CNN 's ` ` American al Qaeda ''
More Americans are turning to radical Islam , some counterterrorism experts say . National security secretary : This is a ` ` paradigm shift '' since the time just after 2001 . Times Square bomb suspect Ali Shahzad allegedly trained in Pakistan . His case is similar to that of Bryant Lane , subject of CNN 's ` ` American al Qaeda ''