The Two Witnesses: First or Second Half of the Tribulation?

Most dispensational commentators agree that the holy city, Jerusalem, will be "trodden down" by the Gentiles for 42 months during the last half of the 70th Week of Daniel (Rev. 11:2; cf. Luke 21:24)). This time period is identical to the 42 months of Rev. 13:5, which is the time God assigns to the Beast, the Antichrist, to blaspheme His name and to persecute His people...