The capture of Ramadi by fighters from the Islamic State of Iraq and the Levant (ISIL) group is being seen as a significant setback for the government.
Ramadi is the capital of the vast desert province of Anbar, where ISIL is seeking to consolidate its gains.
Iraqi government leaders are pledging to recapture Ramadi with the help of Shia units.
But how? And what is ISIL’s military strategy?