Russia has sent a formal letter to the U.S. warning that shipments of sensitive weapons from the United States and NATO were exacerbating tensions in Ukraine and could lead to “unpredictable … ...

Russia has sent a formal letter to the U.S. warning that shipments of sensitive weapons from the United States and NATO could lead to “unpredictable consequences,” The Washington Post reported.… ...

Russia has sent a formal letter to the U.S. warning that shipments of sensitive weapons from the United States and NATO could lead to “unpredictable consequences,” The Washington Post reported.