Hussein Arbeeni, 41, explains how 23 people locked themselves inside a room and put tape around the door to prevent leakage of the sarin struck during a 2013 chemical weapons attack that was blamed on then President Bashar Assad's forces, in Zamalka neighbourhood, on the outskirts of Damascus, Syria, Wednesday, Dec. 25, 2024. (AP Photo/Hussein Malla)
Hassan Arbeeni, 42, shows a crater where a surface-to-surface missile loaded with sarin struck, during a 2013 chemical weapons attack that was blamed on then President Bashar Assad's forces, in Zamalka neighbourhood, on the outskirts of Damascus, Syria, Wednesday, Dec. 25, 2024. (AP Photo/Hussein Malla)
An arial view shows a mass grave where are buried those who were killed by the sarin struck during a 2013 chemical weapons attack that was blamed on then President Bashar Assad's forces, in Zamalka neighbourhood, on the outskirts of Damascus, Syria, Wednesday, Dec. 25, 2024. (AP Photo/Hussein Malla)
Syrian girls plays at an alley that was hit by the sarin struck during a 2013 chemical weapons attack that was blamed on then President Bashar Assad's forces, in Zamalka neighbourhood, on the outskirts of Damascus, Syria, Wednesday, Dec. 25, 2024. (AP Photo/Hussein Malla)
A Syrian girl sits next of her parent house, at an alley that was hit by the sarin struck during a 2013 chemical weapons attack that was blamed on then President Bashar Assad's forces, in Zamalka neighbourhood, on the outskirts of Damascus, Syria, Wednesday, Dec. 25, 2024. (AP Photo/Hussein Malla)
Hussein Arbeeni, 41, centre, sits between his mother mother Khadija Dabbas, 66, left, and his brother Hassan Arbeeni, 42, right, explains how he suffered from the sarin struck during a 2013 chemical weapons attack that was blamed on then President Bashar Assad's forces, in Zamalka neighbourhood, on the outskirts of Damascus, Syria, Wednesday, Dec. 25, 2024. (AP Photo/Hussein Malla)
Hussein Arbeeni, 41, right, speaks with his brother Hassan Arbeeni, 42, right, outside their house at an alley that was hit by the sarin struck during a 2013 chemical weapons attack that was blamed on then President Bashar Assad's forces, in Zamalka neighbourhood, on the outskirts of Damascus, Syria, Wednesday, Dec. 25, 2024. (AP Photo/Hussein Malla)
Hussein Arbeeni, 41, right, stands with his brother Hassan Arbeeni, 42, centre, outside their house at an alley that was hit by the sarin struck during a 2013 chemical weapons attack that was blamed on then President Bashar Assad's forces, in Zamalka neighbourhood, on the outskirts of Damascus, Syria, Wednesday, Dec. 25, 2024. (AP Photo/Hussein Malla)
Hussein Arbeeni, 41, shows how he blocked a room door by tapes where 23 people locked themselves inside it to prevent leakage of the sarin struck during a 2013 chemical weapons attack that was blamed on then President Bashar Assad's forces, in Zamalka neighbourhood, on the outskirts of Damascus, Syria, Wednesday, Dec. 25, 2024. (AP Photo/Hussein Malla)
A Syrian man prays at a mass grave where they buried those who were killed by the sarin struck during a 2013 chemical weapons attack that was blamed on then President Bashar Assad's forces, in Zamalka neighbourhood, on the outskirts of Damascus, Syria, Wednesday, Dec. 25, 2024. (AP Photo/Hussein Malla)
A girl stands at the entrance of her family house who survived from the sarin struck during a 2013 chemical weapons attack that was blamed on then President Bashar Assad's forces, in Zamalka neighbourhood, on the outskirts of Damascus, Syria, Wednesday, Dec. 25, 2024. (AP Photo/Hussein Malla)
A Syrian family pass at an alley that was hit by the sarin struck during a 2013 chemical weapons attack that was blamed on then President Bashar Assad's forces, in Zamalka neighbourhood, on the outskirts of Damascus, Syria, Wednesday, Dec. 25, 2024. (AP Photo/Hussein Malla)
Hussein Arbeeni, 41, right, sits next of his mother mother Khadija Dabbas, 66, left, as he explains how he and his family suffered from the sarin struck during a 2013 chemical weapons attack that was blamed on then President Bashar Assad's forces, in Zamalka neighbourhood, on the outskirts of Damascus, Syria, Wednesday, Dec. 25, 2024. (AP Photo/Hussein Malla)