re: Containment Dome status???

It's unsure as to who the fault lies with right now.

I've heard that each one of these could have played some part in the tragedy, or was the whole cause. But this is all speculation.

Here's the list of things that could have been the problem:

BOP problems. Seems unlikely because of the successful tests and funtioning of BOP and rams. Not saying that rules out this possibility, but you'd think that it wouldn't have worked 3 days earlier (I know equipment can fail at any time) if it was a faulty unit. Cameron was the manufacturer.

I heard that TO modified a valve w/o consent or notification. That's a big no no. Again, not saying this was the case, but if so, some blame can fall on TO.

As you stated, it could have been a bad cement job, or cement could have gotten down into the BOP preventing it from working correctly. In that case, Halliburton is on the hook also.

Essentially, since BP is the operator, and owns the lease they were drilling on, it faults to BP for now, until RCA's (Root Cause Analysis) come out.

You can bet your arse there will be lots of finger pointing in this one.