What if Al-Qaeda had different plans for United Airlines Flight 93 on 9/11?

In our timeline, United Airlines Flight 93 was supposed to either hit the Capitol Building or the White House, but the passengers and crew on that plane foiled the plot by fighting back against the hijackers, resulting in the plane crashing into an empty field in Pennsylvania with no survivors.

But what if Osama bin Laden had a different plan in mind for Flight 93? Let's say in a parallel universe, he reconsiders part of Khaled Sheikh Muhammad's original plan, specifically the part about flying the last plane to an airport and executing all the male passengers while leaving the women and children unharmed.

Two months before the hijackers are sent to America, Osama bin Laden changes his plan regarding the fourth plane. For one thing, he adds Khaled Sheikh Muhammad to the four-person hijacking team that was supposed to seize Flight 93 and crash it into the Capitol, and retasks Ziad Jarrah, the hijacker pilot, with assisting Muhammad in guiding the plane to an airport while Muhammad himself is given the task of leading the other hijackers in beheading the male passengers and crew while releasing the women unharmed.

The passengers, of course, aren't aware of this. They still board Flight 93, hear of the attacks on the World Trade Center and the Pentagon, and plot a counterattack.

Everything else on the flight remains the same: the flight is delayed forty minutes and the passengers still plot and execute their valiant attempt to retake control of the plane. The only Points of diversion are that Khaled Sheikh Muhammad joins Ziad Jarrah and his team of hijackers, and that the plane is not to be flown into a building, but it is to be landed at a nearby airport, where Muhammad makes his demands for a press conference, during which he is to go on an angry tirade against US foreign policy against Muslims, execute all the male passengers and crew and release any women and children unharmed.