David Hogg survived one of the worst school shootings in US history. Now he is working to change gun laws to prevent future shootings. What makes him Teen Strong? Find out more in this profile of the teen who is educating others about gun violence.
多媒體：
多媒體
互動練習
版面：
固定
插圖：
許多
關鍵字詞： David Hogg|Gun reform advocate|Survivor|Teen Strong|Activism|School shooting|Policy change|Youth leader|Gun violence prevention|Advocacy