Is the iPhone 5 on Verizon unlocked or not?

I want to know the real answer. I went to Verizon, and they said that theirs is unlocked. They mentioned that they are allowing users to roam freely in other countries, while others don't. So I went to apple, I asked the sales guy. He told me that it is Verizon's opinion, and he can't say much about it, and he would not risk it, because most of the iphones are supposed to be locked not unlocked. Now I don't know who was right. Why would Apple say that?

It is unlocked.

http://www.nbcnews.com/technology/gadgetbox/verizon-wireless-says-iphone-5-wont-be-relocked-1B6078242