After all the living are gathered together, only the dead will be left behind. Then a great shofar will be blown and all dead Jews will live again. Zerubabel will blow his shofar, and the earth will tremble enough to raise all the bones buried therein, embedded in buildings, burned up, or submerged under a landslide. They will unite, bone by bone, as described in the episode of the valley of dry bones. G-d will give them sinews, flesh and skin. Then, the dew of life -- which contains the light of a soul's life -- will fall upon them from heaven.(Rav Hai Gaon)
(L'Chaim)