Mendel
Senior Member.
you are the one claiming they're marching band instruments (can't be many instruments worse than this for marching, besides a grand piano)I very much doubt the WH had marimbas, xylophones or other similar instruments come in. I mean definitely not impossible
it's possible (1) that the White House had a marching band for the Soldier Ride, presumably military, and it's possible (2) there are military marching bands using marimbas, but I have never seen a marching band with an instrument that big, and would like to see some evidence establishing the aforementioned possibilities before I'm willing to accept that option