Thanks Everyone for the replies, Gail I don't have a behaviorist here, there is nothing like that even half way close to where I live

I wish it were just a simple case of barking, but he actually seems to get very stressed out, I never experienced this before, and he is so calm about everything else except people outside the home. Sometimes I feel like a failure for not being able to stop it and help him calm down. This is the only problem I have with Jesse ( and trying to potty train him to use a pee pad since he is not indoor trained, but a belly band has been a blessing ) he is great in every other way.