U.S. Air Force General Philip Breedlove said on March 22 that he does not "think that any tool of [the] U.S. or any other nation's power should necessarily be off the table."
"Could [supplying Western lethal weapons to Ukraine] be destabilizing? The answer is yes. Also, inaction could be destabilizing," he said.
Breedlove's remarks came at a press conference after he was asked if he favors sending defensive weapons to Ukraine.
Breedlove said the West should respond to what he described as diplomatic, information, military, and economic tactics that were being used against Ukraine.
He didn't name Russia in his comments.
Breedlove added that NATO intelligence pointed to "disturbing" military developments on the ground in eastern Ukraine.