In Luke 21:20 and Luke 21;21, the Christians of the first advent were warned to escape Jerusalem when they saw Jerusalem compassed with armies.  This happened in 66  AD.  Jerusalem was compassed with armies at that time, but the armies withdrew.  Historians are mystified as to why.  This gave the Christians ample time to leave Jerusalem before Titus sacked Jerusalem in 70 AD.  Luke 21: 22-24 continues to describe Jerusalem trodden down of the Gentiles, until the times of the Gentiles be fulfilled.  Then verses 25 through 36 describe events on Earth leading up to the second advent.  Luke 21:36 warns Christians living near the time of the second advent to Watch ye therefore, and pray always, that ye may be accounted worthy to escape al these things that shall come to pass, and to stand before the Son of man.

The Christians could escape bodily from Jerusalem in 66 AD.  The Christians of the second advent have an escape, if they're counted worthy, that will have them standing before the Son of man.

The Christians of the first advent had a 4 year warning.  It is now 4 years before the asteroid named Apophis is to pass close to (or crash?) Earth.  Is 2025 AD for Christians living near the time of the second advent what 66 AD was to the Christians of the first advent?