“Ummm... you do know those are *liquid fueled*, right?”
Reconcile that with the article’s title:
“The BOLE booster will also have a denser solid propellant mix”
And in the article:
“Northrop Grumman to conduct FSB-2 SLS solid rocket booster test”
Yes, but the Falcon rockets you referred to in that post and in the pic above are liquid fueled. Also not a NASA project.