So...this idea is based off the London Blitz and other raids on civilians/cities.
Any tt with either a VC or worth 3+IPC's.
Any convoy zone.
For attacking convoy zones:
On your combat move phase, declare your intent to bomb convoys. Place your strategic bombers and any escorting fighters in an enemy convoy zone. Fighters may scramble, and carrier-based fighters may defend as well. Fight with the SBR rules, and then roll 1 die per strategic bomber. On a roll of 1, 2 or 3, remove that many IPC's from the target's cash on hand. (Amount removed cannot exceed value of neighboring tt's)
For attacking tt's:
Fight like a SBR is occurring. AA fires FROM THE TT'S GUNS. Roll 1 die. On a roll of 1, 2, or 3, remove that many IPC's from the player's cash. Cannot exceed 2 times the tt's income value.