God’s trumpet and air meetings?

What will happen when Jesus returns as conquering hero?  Will we float forever in the clouds? 

The Bible teaches that Jesus lived, died, rose back to life, ascended to heaven (from where he now reigns and rules) and promised to come back to us at what is commonly called the Second Coming.  

In 1 Thessalonians 4:13-18 the apostle Paul, the author of a large chunk of the New Testament, speaks about the Second Coming of Jesus.

 This passage mentions two things that will happen:  God will blow his trumpet and all Christians will meet Jesus in the air.  What’s this all about?