Can't add a second project to a solution's source control

Visual Studio 2015 Update 3

I created a solution with  a project in Visual Studio Online / TSF Source Control. When I create a second project under the solution there is no option anywhere to add this project to source control.  This is happening on every computer I try it on.

I tried removing and reading the project. Closing and opening Visual Studio, Totally deleting everything and restarting.. and the problem keeps happening.