Certainly seems like a reasonable warning.
Check it out:

The next 9/11-style terrorist attack will come from Iraq and Syria if the Iraqi government collapses, Senator Lindsey Graham said on Sunday.

‘According to our own Director of National Intelligence, FBI director, the next 9/11 is coming from here,’ Graham (R-S.C.) said to Bob Schieffer on CBS’s ‘Face the Nation.’

When asked about his personal opinion, Graham said he agreed with that statement and that another 9/11 attack was ‘inevitable.’

‘The seeds of 9/11s are being planted all over Iraq and Syria,’ he said.

Graham made the remarks while speaking about militant Sunni group the Islamic State in Iraq and Syria’s (ISIS) movement toward Baghdad.