Actually, those two verses are two parts of Jesus's coming. First, He had to leave (part 1) and then His return (part 2)Matt 16:27 For the Son of Man is going to come with his angels in the glory of his Father, and then he will repay each person according to what he has done.
Matt 16:28 Truly, I say to you, there are some standing here who will not taste death until they see the Son of Man coming in his kingdom.”
Did it happen as Jesus said ?
No CNN is those days but the historian Josephus wrote :
Matthew 16:27 is about Jesus's return. coming with His angels in the great glory given to Him by the Father.
Matthew 16:28 is about Jesus's ascension to heaven from the mount of Olives in Acts 1. The two angels in Acts 1:10-11 informed the disciples that they (their Jewish descendants) will see Jesus return in like manner, i.e. coming in the clouds - which is the Matthew 16:27 verse.
Acts 1:
9 And when he had spoken these things, while they beheld, he was taken up; and a cloud received him out of their sight.
10 And while they looked stedfastly toward heaven as he went up, behold, two men stood by them in white apparel;
11 Which also said, Ye men of Galilee, why stand ye gazing up into heaven? this same Jesus, which is taken up from you into heaven, shall so come in like manner as ye have seen him go into heaven.
12 Then returned they unto Jerusalem from the mount called Olivet, which is from Jerusalem a sabbath day's journey.
