Clintonesque word choice. A terrorist attack doesn't count unless it was planned outside the US. Inspiring Muslims already in the US to make their own plans, and carry them out, doesn't count. Neither does inserting radical clerics into the US to recruit and motivate terrorists count.
In most of these terror attacks, the culprits had either arrived in the US from islamic countries or recently visited one or more such countries before their atrocities.
We’ve never been told who they met with or what they did on those trips.