ayman dean. >> i would say it's a strong possibility they have infiltrated isis especially with the greater number of people able to approach isis. in fact i would say that the presence of doctors there within isis is a great opportunity to infiltrate, because at the end of the day, they cannot get rid of doctors easily. so i would say, basically that isis by calling upon doctors to come they might have opened a greater door for intelligence services to penetrate them. >> in the meantime u.s. law enforcement says it's contacting about 100 troops targeted in an online threat. >> a group calling itself islamic state hacking division calls it an attack on the troops. pamela brown now with all the details. >> reporter: among the personal information posted on the hit list pictures, home addresses and phone numbers of commanders,