The eagle and ribbons are different.

The others are enlisted men. The light blue on the hat and shoulder rope indicates infantry.

Left side of frame

Front person: Marine sergeant
Middle: Air Force enlisted, can't tell rank
Rear: Navy enlisted, can't tell rank

Right side of frame:

Front person: Army staff sergeant
Middle: Navy enlisted, can't tell rank
Rear: Coast Guard enlisted

Commander of the detail (immediately behind casket): Army captain

Beside captain and behind Coast Guardsman: Marine, can't tell rank

Holding Mrs. McCain's hand: Army enlisted

Directly behind her: Navy, probably an officer

Two troops at far edges of the frame: Army enlisted

The captain has been to Ranger School - the little arch-shaped device between his Combat Infantry Badge and his Parachutist wings is a Ranger tab - but that's a requirement for all infantry officers.

There are so many Army guys there because the unit responsible for conducting military funerals in the National Capitol Region is the 3rd United States Infantry (The Old Guard), an Army unit. He has two sailors carrying his casket because in a joint-service funeral like this one, the servicemember's branch always gets to provide the sixth pallbearer.

As an aside, I wonder how hard it was to find a Marine sergeant and an Army sergeant who look as much alike as those two guys in the front rank do.

slight correction.

Seaman, E3.

Imagine what it’s like to join the military and get such a high profile assignment. You never know what life is going to bring, and something like this has to be very special. Probably a lot of proud parents for those guys.

These are the same troops who do the Tomb of the Unknowns Guard detail.

My drill sergeant was a Tomb guard. There's a badge you get when you qualify to be a Tomb guard, and you wear it the rest of your career. One of our number was brave enough to ask about the 3rd US Infantry, and he was happy to tell us: You have to go to a special unit school for each of the duties you want to do. If you want to be a funeral person, you go to funeral school and they train you in both pallbearer and rifle salute. If you want to walk the Tomb detail, that gets pickier...there are height and weight restrictions (not less than six feet tall - I'm 5-9 so I'd never make it), no glasses, a natural military bearing...they have auditions just to get into the school and then you have to train and train to be perfect enough to do the job.

I know, because I used to be billeted at Ft. Myer when I was stationed at the Pentagon

I posted it because I had trouble IDing the one guy. You don’t get to see stuff like this every day

To answer your question re the blue and gold ribbon on the hat of the officer behind the casket.

Any question you have about Army uniforms can be found in here:

https://www.usi.edu/media/3353508/AR_670-1.pdf

as do the crossed rifles on his lapels and the light blue cord on his right shoulder; he also has the Combat Infantry Badge and jump wings with a Ranger tab (he's in an Airborne division; you can tell because he's also wearing the French fourragere on his left shoulder; the 101st and 82nd were awarded the French fourragere after the Normandy invasion in 1944); and he's a captain (he has captain's bars on his shoulder boards).

during the time he carried the casket at the beginning of the week and Sat.

They are very proud of him in this role. My friend is Republican, but not a Trumper, so there's that.