When you first go to the website as a first time visitor, it will presents you with a page of a global map where you will click on a country which you wish to start with/visit.  The website then sets a cookie in your computer. 
If you do not have this cookie (i.e. never been there before) any link to a model will only deliver you back to the start page (Global map again). So in order to avoid going back, just click on US or UK website and that will set you in to AT website immediately. 

Thank you for your understanding & support