People attend the "Marawi Week of Peace" in Marawi City, the Philippines, May 23, 2018. The local government and residents held the event to remember those who lost their lives during the pro-IS militants' siege of the city one year ago. (Xinhua/Rouelle Umali)

A woman cries during the "Marawi Week of Peace" in Marawi City, the Philippines, May 23, 2018. The local government and residents held the event to remember those who lost their lives during the pro-IS militants' siege of the city one year ago. (Xinhua/Rouelle Umali)

People release white balloons during the "Marawi Week of Peace" in Marawi City, the Philippines, May 23, 2018. The local government and residents held the event to remember those who lost their lives during the pro-IS militants' siege of the city one year ago. (Xinhua/Rouelle Umali)

People pray during the "Marawi Week of Peace" in Marawi City, the Philippines, May 23, 2018. The local government and residents held the event to remember those who lost their lives during the pro-IS militants' siege of the city one year ago. (Xinhua/Rouelle Umali)