![Darko Vojinovic A woman stands in front of the Vladislav Ribnikar school prior to a ceremony to mark the first anniversary of a shooting that killed 10 people in Belgrade, Serbia, Friday, May 3, 2024. (AP Photo/Darko Vojinovic)](https://mapi.associatedpress.com/v2/items/5c395025d2304585b159b8894690faf5/preview/preview.jpg?s=680x)
A woman stands in front of the Vladislav Ribnikar school prior to a ceremony to mark the first anniversary of a shooting that killed 10 people in Belgrade, Serbia, Friday, May 3, 2024. (AP Photo/Darko Vojinovic)
![Darko Vojinovic People gather in front of the Vladislav Ribnikar school during a ceremony to mark the first anniversary of a shooting that killed 10 people in Belgrade, Serbia, Friday, May 3, 2024. (AP Photo/Darko Vojinovic)](https://mapi.associatedpress.com/v2/items/2501e2f38aae4709a4610635d40fc2aa/preview/preview.jpg?s=680x)
People gather in front of the Vladislav Ribnikar school during a ceremony to mark the first anniversary of a shooting that killed 10 people in Belgrade, Serbia, Friday, May 3, 2024. (AP Photo/Darko Vojinovic)
![Darko Vojinovic People cry in front of the Vladislav Ribnikar school during a memorial ceremony to mark the first anniversary of a shooting that killed 10 people in Belgrade, Serbia, Friday, May 3, 2024. (AP Photo/Darko Vojinovic)](https://mapi.associatedpress.com/v2/items/8825078f7c0840bc8d03d598ff66827d/preview/preview.jpg?s=680x)
People cry in front of the Vladislav Ribnikar school during a memorial ceremony to mark the first anniversary of a shooting that killed 10 people in Belgrade, Serbia, Friday, May 3, 2024. (AP Photo/Darko Vojinovic)
![Darko Vojinovic People cry in front of the Vladislav Ribnikar school during a memorial ceremony to mark the first anniversary of a shooting that killed 10 people in Belgrade, Serbia, Friday, May 3, 2024. (AP Photo/Darko Vojinovic)](https://mapi.associatedpress.com/v2/items/3e1a35c607bc4c4dba5a60dfe56da288/preview/preview.jpg?s=680x)
People cry in front of the Vladislav Ribnikar school during a memorial ceremony to mark the first anniversary of a shooting that killed 10 people in Belgrade, Serbia, Friday, May 3, 2024. (AP Photo/Darko Vojinovic)
![Darko Vojinovic A man stands in front of the Vladislav Ribnikar school prior to a memorial ceremony to mark the first anniversary of a shooting that killed 10 people in Belgrade, Serbia, Friday, May 3, 2024. (AP Photo/Darko Vojinovic)](https://mapi.associatedpress.com/v2/items/d8513e469878492295f0245ca24e87e2/preview/preview.jpg?s=680x)
A man stands in front of the Vladislav Ribnikar school prior to a memorial ceremony to mark the first anniversary of a shooting that killed 10 people in Belgrade, Serbia, Friday, May 3, 2024. (AP Photo/Darko Vojinovic)
![Darko Vojinovic People stand in front of the Vladislav Ribnikar school prior to a ceremony to mark the first anniversary of a shooting that killed 10 people in Belgrade, Serbia, Friday, May 3, 2024. (AP Photo/Darko Vojinovic)](https://mapi.associatedpress.com/v2/items/00fb9c4340ea4052add3b5830d47464b/preview/preview.jpg?s=680x)
People stand in front of the Vladislav Ribnikar school prior to a ceremony to mark the first anniversary of a shooting that killed 10 people in Belgrade, Serbia, Friday, May 3, 2024. (AP Photo/Darko Vojinovic)
![Darko Vojinovic People gather in front of the Vladislav Ribnikar school during a memorial ceremony to mark the first anniversary of a shooting that killed 10 people in Belgrade, Serbia, Friday, May 3, 2024. (AP Photo/Darko Vojinovic)](https://mapi.associatedpress.com/v2/items/bdcb590c663b407f832d94c3c39cc1d8/preview/preview.jpg?s=680x)
People gather in front of the Vladislav Ribnikar school during a memorial ceremony to mark the first anniversary of a shooting that killed 10 people in Belgrade, Serbia, Friday, May 3, 2024. (AP Photo/Darko Vojinovic)
![Darko Vojinovic People cry in front of the Vladislav Ribnikar school during a memorial ceremony to mark the first anniversary of a shooting that killed 10 people in Belgrade, Serbia, Friday, May 3, 2024. (AP Photo/Darko Vojinovic)](https://mapi.associatedpress.com/v2/items/cfff6d0de93547869e19d84a90c79fe0/preview/preview.jpg?s=680x)
People cry in front of the Vladislav Ribnikar school during a memorial ceremony to mark the first anniversary of a shooting that killed 10 people in Belgrade, Serbia, Friday, May 3, 2024. (AP Photo/Darko Vojinovic)
![Darko Vojinovic People gather in front of the Vladislav Ribnikar school during a memorial ceremony to mark the first anniversary of a shooting that killed 10 people in Belgrade, Serbia, Friday, May 3, 2024. (AP Photo/Darko Vojinovic)](https://mapi.associatedpress.com/v2/items/a67bbc785cd348d2a1447c1200d1b577/preview/preview.jpg?s=680x)
People gather in front of the Vladislav Ribnikar school during a memorial ceremony to mark the first anniversary of a shooting that killed 10 people in Belgrade, Serbia, Friday, May 3, 2024. (AP Photo/Darko Vojinovic)
![Darko Vojinovic People gather in front of the Vladislav Ribnikar school during a memorial ceremony to mark the first anniversary of a shooting that killed 10 people in Belgrade, Serbia, Friday, May 3, 2024. (AP Photo/Darko Vojinovic)](https://mapi.associatedpress.com/v2/items/efa05e5bf7a84b76b0daebe71d30eb0b/preview/preview.jpg?s=680x)
People gather in front of the Vladislav Ribnikar school during a memorial ceremony to mark the first anniversary of a shooting that killed 10 people in Belgrade, Serbia, Friday, May 3, 2024. (AP Photo/Darko Vojinovic)
![Darko Vojinovic A man stands in front of the Vladislav Ribnikar school prior to a ceremony to mark the first anniversary of a shooting that killed 10 people in Belgrade, Serbia, Friday, May 3, 2024. (AP Photo/Darko Vojinovic)](https://mapi.associatedpress.com/v2/items/51596bfd43074780b1e1138f0174c997/preview/preview.jpg?s=680x)
A man stands in front of the Vladislav Ribnikar school prior to a ceremony to mark the first anniversary of a shooting that killed 10 people in Belgrade, Serbia, Friday, May 3, 2024. (AP Photo/Darko Vojinovic)
![Darko Vojinovic People gather in front of the Vladislav Ribnikar school during a memorial ceremony to mark the first anniversary of a shooting that killed 10 people in Belgrade, Serbia, Friday, May 3, 2024. (AP Photo/Darko Vojinovic)](https://mapi.associatedpress.com/v2/items/5ed9b2d5a1d948c7bab47f79652f3f98/preview/preview.jpg?s=680x)
People gather in front of the Vladislav Ribnikar school during a memorial ceremony to mark the first anniversary of a shooting that killed 10 people in Belgrade, Serbia, Friday, May 3, 2024. (AP Photo/Darko Vojinovic)
![Darko Vojinovic People gather in front of the Vladislav Ribnikar school during a memorial ceremony to mark the first anniversary of a shooting that killed 10 people in Belgrade, Serbia, Friday, May 3, 2024. (AP Photo/Darko Vojinovic)](https://mapi.associatedpress.com/v2/items/49ec071579af4a32adb18343a51a95a5/preview/preview.jpg?s=680x)
People gather in front of the Vladislav Ribnikar school during a memorial ceremony to mark the first anniversary of a shooting that killed 10 people in Belgrade, Serbia, Friday, May 3, 2024. (AP Photo/Darko Vojinovic)
![Darko Vojinovic People gather in front of the Vladislav Ribnikar school during a memorial ceremony to mark the first anniversary of a shooting that killed 10 people in Belgrade, Serbia, Friday, May 3, 2024. (AP Photo/Darko Vojinovic)](https://mapi.associatedpress.com/v2/items/48e51896f4b64958803e54763dfc94af/preview/preview.jpg?s=680x)
People gather in front of the Vladislav Ribnikar school during a memorial ceremony to mark the first anniversary of a shooting that killed 10 people in Belgrade, Serbia, Friday, May 3, 2024. (AP Photo/Darko Vojinovic)