Drrr, the dead IN Christ and the living in Christ = some from the entire earth population. It's not rocket science.
"Where does Revelation teach believers meet Lord in the air/clouds" ?
Rev 14:15, 16 - And another angel came out of the temple, calling out with a loud voice to Him who sat on the cloud, “Put in your sickle and reap, for the hour to reap has come, because the harvest of the earth is ripe.” So He who sat on the cloud thrust in His sickle on the earth, and the earth was reaped.
There is more than just this one, but I can't be bothered look them up.
