level. >> we have to remain vigilant here at home. >> reporter: newly unsealed court documents paint a clearer picture to catch potential terrorists before they strike. >> i'm literally shocked. >> reporter: people in fremont, california, are stunned over allegations made against adam shaffi. the 22-year-old was stopped by the feds as he tried boarding a flight from san francisco to turkey last summer. wiretaps revealed he believed america is the enemy, and he said to a friend, i am content to die with them. referring to the terror group, al-nusra front. the fbi believes he was headed to join the organization when he was stopped. his legal team denies those allegations, saying their client was simply on a humanitarian mission. in a statement, his attorney says adam is innocent, and he sought to assist syrian refugees. >> it's pretty crazy. you know, when it's right here at home, it's a different story. >> reporter: people in harrisburg, pennsylvania, are reacting to the arrest of their