Looks like Gotham with the alternate single storey /a.

I appreciate your perspective and durability. Your loyalty was so amazing - I only wish they could have proven all the meeting like I saw. John was also fantastic. all best serials

http://www.myfonts.com/fonts/marksimonson/proxima-nova/semibold/glyphs.html

this one seems closer. to me, anyway. and yes with the alt a.