Empty school buses as a representation of student lives lost

<img width=“750” height=“500” src=“https://flowingdata.com/wp-content/uploads/2022/07/NRA-Childrens-Museum-750x500.jpg" class=“attachment-medium size-medium wp-post-image” alt=“” loading=“lazy” srcset=“https://flowingdata.com/wp-content/uploads/2022/07/NRA-Childrens-Museum-750x500.jpg 750w, https://flowingdata.com/wp-content/uploads/2022/07/NRA-Childrens-Museum-1090x727.jpg 1090w, https://flowingdata.com/wp-content/uploads/2022/07/NRA-Childrens-Museum-210x140.jpg 210w, …