Regime change in Spain and Spain out of Iraq.
To quibble, those weren't suicide bombers, just bombers. Spain had serious potential for regime change regardless - the effect had less to do with the bombings than with the government's response to the bombings.
The strategic goal was to weaken international support for US ops in Iraq - and they were already pretty weak.
More to the point, Peters argues the suicide bombers are so effective that a modern military cannot cope with them, and therefor a modern military does not need modern military equipment. Fortunately, I believe his views will be about as strategically effective as the suicide bombers - convincing only those who are already convinced.