Government soldiers stand guard in front of damaged building and houses in Sultan Omar Dianalan boulevard at Mapandi district in Marawi city, southern Philippines September 13, 2017. Picture taken September 13, 2017. REUTERS/Romeo Ranoco
Government soldiers stand guard in front of damaged building and houses in Sultan Omar Dianalan boulevard at Mapandi district in Marawi city, southern Philippines. Romeo Ranoco / Reuters

Siege of Marawi: How Philippines insurgency provided fertile recruiting ground for extremists