Whats is the mean of "black-cad"?
The complete phrase is:

Pining medals on soldiers and black-cad members of the Iraqi Counter-Terrorism-Service

From The Economist: December 17 th 2016Sorry.
"Pinning medals on soldiers and black-clad...."

Question

Whats is the mean of "black-cad"?
The complete phrase is:

Pining medals on soldiers and black-cad members of the Iraqi Counter-Terrorism-Service

From The Economist: December 17 th 2016Sorry. 
"Pinning medals on soldiers and black-clad...."

Answer

Are you sure it wasn't "black-clad"?
That would mean that they were dressed in black

Answer

I'm sure you meant "black-clad" which means they're wearing black clothing.

Answer

Yes, the original is here:
http://www.economist.com/news/united-states/21711884-our-columnist-travels-americas-outgoing-defence-secretary-afghanistan-and-iraq
and it is "black-clad" and it means "dressed in black clothing."

Also, the first word is "pinning," with two n's. "Pining" is actually a completely different word with a different pronunciation. Medals fasten to clothing with a sharp pin in the back, and "pinning" a medal means "attaching the medal to somebody's clothing."

لا تفوّت فرصة تعلّم لغة جديدة وأنت مرتاح في منزلك. تصفّح مجموعتنا المختارة من مدرّسي اللغات ذوي الخبرة وسجّل في درسك الأول الآن!