Surface transportation for the President is a limousine, not a motor home. Bigger is not better.
Israel did not know about the tunnels. Right.
They have no intrusion detection equipment that has been available and has been steadily improved since Vietnam.
If single-pilot operation is ever approved for regularly-scheduled airline service, a one-a-day production rate will be required.
The 400,000 Lbs DC-10 became the 600,000 Lbs. MD-11. The DC-9 became the MD-80. An engine change requires airframe changes, but there's no need to start from scratch.
If the engines have cascaded centrifugal compressors with interstage cooling, then their efficiency will eclipse Western designs.