This article has multiple issues. In particular, signs of the rapture pdf has problems with especially capitalization.
Statements consisting only of original research should be removed. Post-tribulationists believe that Christians will remain on the Earth throughout a whole 7-year Tribulation period which includes the last three and a half years, which some differentiate by calling the last three and a half years the Great Tribulation period. Son of man in heaven: and then shall all the tribes of the earth mourn, and they shall see the Son of man coming on the clouds of heaven with power and great glory. And he shall send forth his angels with a great sound of a trumpet, and they shall gather together his elect from the four winds, from one end of heaven to the other.
For this we say unto you by the word of the Lord, that we that are alive, that are left unto the coming of the Lord, shall in no wise precede them that are fallen asleep. Lord in the air: and so shall we ever be with the Lord. For additional references, see also the parallel passages from Mark 13:24-27 and Luke 21:20-28. While the passages in Luke 21 parallels Matthew and Mark, it offers a couple of interesting clarifications.
This passage in Luke offers interesting references to some of the major events which are greatly elaborated on in the Book of Revelation. They came to life, and reigned with Christ a thousand years. The rest of the dead did not come to life until the thousand years were ended. This is the first resurrection. Blessed and holy is he who shares in the first resurrection!