Candles and flower are placed during a vigil for the victims of the shooting at Marjory Stoneman Douglas High School at Pine Trails Park in Parkland, Florida, the United States, on Feb. 15, 2018. A total of 17 people were killed and 14 others wounded in a mass shooting in a high school in Florida in the United States Wednesday. (Xinhua/Monica McGivern)

(180216) -- PARKLAND (U.S.), Feb.16, 2018 (Xinhua) -- People attend a vigil for the victims of the shooting at Marjory Stoneman Douglas High School, in Pine Trails Park in Parkland, Florida, the United States, on Feb. 15, 2018. A total of 17 people were killed and 14 others wounded in a mass shooting in a high school in Florida in the United States Wednesday. (Xinhua/Monica McGivern)

(180216) -- PARKLAND (U.S.), Feb.16, 2018 (Xinhua) -- Photo of Peter Wang, a Chinese American victim, is placed during a vigil for the victims of the shooting at Marjory Stoneman Douglas High School, in Pine Trails Park in Parkland, Florida, the United States, on Feb. 15, 2018. A total of 17 people were killed and 14 others wounded in a mass shooting in a high school in Florida in the United States Wednesday. (Xinhua/Monica McGivern)

(180216) -- PARKLAND (U.S.), Feb.16, 2018 (Xinhua) -- People attend a vigil for the victims of the shooting at Marjory Stoneman Douglas High School, in Pine Trails Park in Parkland, Florida, the United States, on Feb. 15, 2018. A total of 17 people were killed and 14 others wounded in a mass shooting in a high school in Florida in the United States Wednesday. (Xinhua/Monica McGivern)

(180216) -- PARKLAND (U.S.), Feb.16, 2018 (Xinhua) -- People hug each other during a vigil for the victims of the shooting at Marjory Stoneman Douglas High School, in Pine Trails Park in Parkland, Florida, the United States, on Feb. 15, 2018. A total of 17 people were killed and 14 others wounded in a mass shooting in a high school in Florida in the United States Wednesday. (Xinhua/Monica McGivern)