Security cameras have been installed, scales calibrated and signs declaring “no returns” hung on the walls at Capital City Care.

There’s just one thing missing before the District’s first medical marijuana dispensary can open its doors: The marijuana itself.

“It’s very high-grade, very pure, very potent marijuana,” said David Guard, co-founder and general manager. “But first, everything has to be triple-checked. We have a high level of security and an inordinate number of cameras.”