[sukhoi-30mki]

The range of an ICBM should negate any disadvantage the 747 has; How many countries can target/track a 747 launching missiles 5,000 miles away?

[Chainmail]

You miss the point: using 747s or any other civilian airliner accepts the risk of a non-combat accident in which multiple nuclear warheads are scattered all over the countryside forming a 25,000 year toxic radiation hazard. Aren't you familiar with the deadly consequences of scattering Plutonium or Uranium-234?

Meanwhile, all 747s become legitimate military targets.

Dumb.

[Alter Kaker]

The range of an ICBM should negate any disadvantage the 747 has; How many countries can target/track a 747 launching missiles 5,000 miles away?

Presumably every country since air traffic over the United States isn't exactly a closely guarded secret. These plans can't turn off their transponders or we run a risk of collisions with normal civilian aircraft.