ISB ~ 1 Thessalonians 4 v17

caught up:Or, “raptured”. Believers living on the earth when Christ returns will be drawn up to join the saints of the ages as they ascend into glory. Paul seems to assert, not that the final generation will die and then be raised, but that their bodies will be instantly glorified and made immortal. This is how Paul was understood by the Greek Fathers of the Church, and this agrees with the prophetic outlook of 1 Cor 15:51-53.