Smoke and question marks still hang over the devastated Gaza Strip one year after Hamas' Oct. 7 attack touched off a regional firestorm.

The war has killed tens of thousands and devastated entire cities, leaving many in Gaza without a home and fueling a humanitarian catastrophe.

Vigils, commemorations and acts of remembrance are being held across the world to mark a year since the Oct. 7 Hamas attack on Israel as world leaders call for an end to antisemitism and the release of Israeli hostages.