Answering questions from CNN anchor Wolf Blitzer, Comey said the FBI has not determined yet if Mohammad Youssef Abdulazeez, the gunman who killed four US Marines and a Navy sailor in Chattanooga last week, was influenced by ISIs or al-Qaeda.Even while asserting that the FBI has a “reasonable handle” on ISIS activities, Comey admitted that his organisation does not have the access to encrypted communication. In the context of the public support for Internet privacy and at the same demand for public safety, Comey said: “We have to, as a country, figure out how to solve this (dilemma).”Noting that ISIS tweeters in Syria have 21,000 English language followers, Comey said hundreds of them, possibly thousands, are in the US and it is the job of the FBI and its partners in federal and local governments to figure out who they are and what they are up to.