Why Did the US Use Depleted Uranium Weapons in Syria?

Weir, Doug
http://www.counterpunch.org/2017/02/23/why-did-the-us-use-depleted-uranium-weapons-in-syria/

Publisher:  Counterpunch
Date Written:  23/02/2017
Year Published:  2017  
Resource Type:  Article
Cx Number:  CX20467

The recent confirmation by the US that DU ammunition was used in two attacks in Syria in late 2015 raises a number of troubling questions. Firstly, why was DU used? Has it been used again? Will it be used again?