The vast majority of those self-identified as Christians look forward to the Second Coming of Jesus Christ. However, across the many denominations, the details of Christ's second coming are somewhat diverse. Few dare to claim complete and authoritative interpretation of the typically symbolic and prophetic biblical sources. What is commonly accepted is that he is to return to judge the world and to establish the Kingdom of God, in other words to fulfill the rest of Messianic prophecy. Some mainstream Christians may also form their own ideas of how and where it will happen, but recognize that such information is not important and is not essential to receiving "salvation". 

Question: Do you believe Jesus Christ will return?
Answer: "Yes, Jesus is Coming Soon"
- The Universe

Question: Do you know what He is coming for?
Answer: Matt 10:34 "Do not think that I have come to bring peace on earth; I have not come to bring peace, but a sword." - Jesus Christ

Question: Do you know what your supposed to do?
Answer: "Don't be afraid, be ready!"
- John Ashcroft

Question: Where can I learn about the 2nd coming of Jesus Christ?
Answer: www.TeachingFaith.com
- Addison B. Bachman

As Jesus was sitting on the Mount of Olives, the disciples came to him privately. "Tell us," they said, "when will this happen, and what will be the sign of your coming and of the end of the age?" So when you see standing in the holy place 'the abomination that causes desolation,' spoken of through the prophet Daniel—let the reader understand—then let those who are in Judea flee to the mountains. Let no one on the roof of his house go down to take anything out of the house. Pray that your flight will not take place in winter or on the Sabbath. For then there will be great distress, unequaled from the beginning of the world until now—and never to be equaled again. Immediately after the distress of those days the sun will be darkened, and the moon will not give its light; the stars will fall from the sky, and the heavenly bodies will be shaken. At that time the sign of the Son of Man will appear in the sky, and all the nations of the earth will mourn. They will see the Son of Man coming on the clouds of the sky, with power and great glory. Even so, when you see all these things, you know that it is near, right at the door. I tell you the truth, this generation will certainly not pass away until all these things have happened. – Matthew 24:1-34, Mark 13:1-30, Luke 21:5-32

Both Matthew and Luke also include the statement:

This generation (γενεά) will not pass away until all these things have taken place. – Matthew 24:34, Mark 13:30, Luke 21:32

The Bauer lexicon (since updated by Arndt and Gingrich) of Koine Greek states that γενεά (genea) means “the sum total of those born at the same time, expanded to include all those living at a given time. Generation, contemporaries.” Robinson's Greek & English Lexicon states that γενεά(genea) means: "The interval of time between father & son... from thirty to forty years those living in any one period; this present generation."

According to Dr. William L. Lane, author of the 2 volume Hebrews commentary in the Word Biblical series and the Mark commentary in the New International Commentary series

The significance of the temporal reference has been debated, but in Mark ‘this generation’ clearly designates the contemporaries of Jesus. [Mark 8:12] [8:38] [9:19] There is no consideration from the context which lends support to any other proposal. Jesus solemnly affirms that the generation contemporary with his disciples will witness the fulfillment of his prophetic word, culminating in the destruction of Jerusalem and the dismantling of the Temple.

Some such as Jerome interpret the phrase "this generation" to mean lifetime of the Jewish race; however, if Jesus meant "race" he would have used genos (race) not genea (generation). Others such as Hal Lindsey see it applying to a generation of future readers rather than the generation of people Jesus was addressing within the narrative. Origen and Chrysostom refer it to all Christian believers.

In the epistles, it has been suggested that 1 Thess. 5:1-11 is a post-Pauline insertion that serves as an apologetic correction to Paul's imminent expectation of the second coming in 1 Thess. 4:13-18.

According to the Lord's own word, we tell you that we who are still alive, who are left till the coming of the Lord, will certainly not precede those who have fallen asleep. For the Lord himself will come down from heaven, with a loud command, with the voice of the archangel and with the trumpet call of God, and the dead in Christ will rise first. After that, we who are still alive and are left will be caught up together with them in the clouds to meet the Lord in the air. And so we will be with the Lord forever. – 1 Thess. 4:15-17