Sorry Heathrow Harry but that’s so wrong remember 7/7,
Remember the troubles in Ireland Dublin Belfast rail line constant target.
Remember Madrid and Paris
In Israel buses have been bombed relentlessly for decades
Ground transport is at significant threat and risk and it’s a much softer target in the main.
Successful use of airliners as weponry have been exceptionally rare, caveat the those utterly abhorrent events in New York and Washington many years ago.
Criminal activity involving airliners have mainly been political hijacking and indeed many have been from the US to Cuba over the years .
Even hijacks have steadily declined because of the levels of security at the front of the house and the armoured door locked cockpits these days.