The TARP (Troubled Asset Relief Program) program, the early US stress tests, and various actions to recapitalise troubled banks and dispose of poorly performing assets were all important in this regard. A second reason is one that I have already alluded to.
The events of recent years have amounted to a two-stage crisis, and the second stage of it was specifically European (or more accurately, euro area) in focus. The third is the interdependency between growth and financial stability.