Frost wrote this as the OP:...
Wondering if this may be an inauguration policy of long standing that transcends administrations, Gun Rights Examiner made a cursory search and found something even more curious. In the 2009 Inaugural Parade, the United States Navy marched with rifles that had not been so disabled (see 1:24 into that video plus the final slide)....
Bear with me for a second folks as I do a little story telling...
I was at the Air Force Academy from 1990 to 1994. For Basic Cadet Training we were issued M1 Garands. After BCT, we turned those rifles back in. Then maybe a month before Recognition we were again issued M1 Garand rifles. All of them had been de-milled by having a steel rod welded inside the chamber area. There were a few incidents of cadets committing suicide with them back in the 60's or 70's, so that's why they all had those rods welded inside them. Otherwise the whole exterior of the gun remained the same and functioned normally.
I went back in 2004 for my 10 year class reunion. IIRC, all of the cadets were issued M14s. I didn't look closely, but I ASSumed they were all de-milled as well using the same process. The other sister service academies send a select few of their cadets or midshipman to USAFA the fall semester of their junior years. I did get a pretty good look at the squids's uniforms.
So from the pics I have seen elsewhere of these navy personnel marching with rifles, their uniforms look consistent with midshipman exchange cadets I had seen.
So, yes, I think those were Annapolis midshipman who were marching with M14's that had been de-milled the same way as my M1 Garand.
In other words, much ado about nothing.
a mountain out of a molehill.