I think anyone outside of the US is not able to view MJNA's Facebook page. I saved the page in a FB list and had no trouble seeing the page until a few weeks ago (the page loads automatically, so it's seemingly unreasonable to claim that it is due to user error.) It probably was a mistake/glitch. These things have happened in the past to other pages (see http://storiesmynanatells.com/smart-tips/doyouknowhow2/ for an example.)
If anyone at MJNA IR is watching, you might want to double check your page settings.