This is a false Doctrine egged on by misguided assuptions of timing and translated wording even Paul himself wrote an ammendment to this fact. This event is not for the church that is yet to be formed and is not yet formed completly. Christ's bride is not collected until after the world is put into order.
However such an event takes place, but no one goes anywhere for Christ and God are coming to us to reside here in the new earth and the new heaven. This event that everyone of those teaching or misteaching and my some have rewritten the Good Book to meet their needs and fill their churches seats and bank accounts.
But this event is at the end of the anti christ's rule after about five and a half month not the full seven years as some still believe for God has shorten this period for the elects sake.
This fly away Doctrine is a false hood is not Biblical or is in the story until the late 20th century. Again Jesus completed the work there is no new phrophets or phophecies but HIS sorry JW's LDS's no new prophets or prophecies It is finsihed.