> Who did the US bomb before 9/11?
Iraq, during the Gulf War.
> Who did the US bomb before Pearl Harbor?
Japan, though the US didn't bomb them, it instituted an oil embargo and asset freeze.
> Who did the US bomb before its embassies in East Africa were attacked
Iraq, during the Gulf War.
> Who did the US bomb before https://en.wikipedia.org/wiki/Pan_Am_Flight_103 ?
Tripoli and Benghazi, Iran Air Flight 655.
I don't understand the purpose of these questions. Were you thinking the US was just minding its own business and some bad guys came and attacked it?
The US are also the major enabler of Israel's colonial expansion and ethnic cleansing of Palestinians. This was clearly expressed by Bin Laden himself as one of the motives behind the 9/11 attacks.
> Were you thinking the US was just minding its own business and some bad guys came and attacked it
As I remember, this was exactly the way the US explained 9/11: "they hate us for our freedom".