Revelation 11:1-14 prophesies that God will send two witnesses to preach in Jerusalem for the first 3½ years of the last 7 years of all time. At the mid-point of this last “week” of years, God will allow the Beast to kill them. After this, Scripture says:
“Those from every people, tribe, tongue, and nation will gaze on their corpses for three and a half days.”
Such a thing would have been impossible until fairly recently. However, with the invention and widespread use of satellite television, portable communications devices and the Internet, such a thing is now more than possible.