I chatted with second level tech support in the afternoon yesterday and the tech said this error is not on their end but it is on the particular web sites I was trying to access, he assumed they were blocking my IP address, or rather the IP address Uverse assigned to me. 

One down was Yahoo mail,  others posted it was down for some...not for others.  One post on another web site said it was a server issue in CA. Mine showed packet loss on all those that would not load. 

All those that would not work today are now working fine.