Sounds good except with it being an attempt against @POTUS as well. There is a video of MSB being escorted out of a casino first floor by a heavily armed group of operators. MSB is incognito, wearing cargo shorts and a T-shirt and carrying what is probably a box of his "chips". There is no way he was meeting with POTUS in secret. POTUS probably watched the events unfold real-time from D.C. I'll have to dig for the sauce but I assure you it's there.
*MBS, sorry…still digging.
Here's the sauce for MBS and more. The link claims the King of SA was there as well and was also a target.
https://americandigitalnews.com/2017/11/07/las-vegas-saudi-crown-prince-salman-assassination-attempt/#.W2Mcv_ZFzIU
There is also a forensic link that compares MBS in civis to the man being escorted. Very balding in front of head under his headdress. Same-same.