Old glory isn't going anywhere now!
Even something as simple as installing a flag holder can be a process. First thing I tried were long tapcon screws. Those didn't work and were pulled out of the brick by the flag whipping in the wind. The second method I tried involved lead based anchors for masonry. These had to be some of the weakest lead coated anchors I've ever dealt with as two of them were snapped off because of the flag blowing in