Did Jesus say that he was coming back within a generation?

It seems that Jesus was admitting that he would return after the destruction of the temple in 70 A.D. That the abomination of desolation was the Roman leader Titus. 14 “But when you see the abomination of desolation[w] standing where it[x] should not be” (let the reader understand),[y] “then those in Judea must flee[z] to the mountains. 15 The one on the roof[aa] must not come down or go inside to take anything out of his house.[ab] 16 The one in the field must not turn back to get his cloak. 17 Woe to those who are pregnant and to those who are nursing their babies in those days! 18 Pray that it may not be in winter. (Mark 13:14-18 NET) Jesus then says that after this happens he will come back. “But in those days, after that suffering,[ai] the sun will be darkened and the moon will not give its light... Then everyone[ak] will see the Son of Man arriving in the clouds[al] with great power and glory. 27 Then he will send angels and they will gather his elect from the four winds, from the ends of the earth to the ends of heaven.´(Mark 13:24,27 NET).