Here’s a few others that David didn’t include:

Police officer murdered outside suburban church after car chase.

Post offices.

Those two events occurred within a few miles of where I currently live.

Jewish community centers.
YMCAs.

VFWs

Knights of Columbus

National Parks (and here)

As I’ve said, it’s a whole lot easier to figure out where not to station a federal officer since murders have occurred in every conceivable kind of venue.