Who are the “Tribulation Saints” and are they “Left Behind”?

Nelson Walters examines who the saints are, who endure and overcome the 70th Week of Daniel or Tribulation Period: the so-called “Tribulation Saints.” Nelson answers the questions:  Are people left behind by the Rapture who are later saved and, if so, are they part of the Body of Christ and the Bride of Christ? And who are the believers who come out of the Great Tribulation in Revelation 7:14?