By helping Ukraine, NATO sends signals of resoluteness that could deter Russia from additional aggressive actions and attempts at territorial expansion.
An Israeli attack in Syria this week killed two officers from Iran's Revolutionary Guards, the Islamic republic's ideological army said, vowing revenge.
The US was caught off guard when Poland announced it was prepared to provide Mig-29 fighter jets under a reported scheme that would eventually send the planes to Ukraine, a US official said.
Saudi Arabia announced a deal with Lockheed Martin to manufacture elements of the missile defenses of the Gulf state, the target of frequent cross-border attacks by rebels in Yemen.
Top US General Mark Milley asked American troops stationed in Europe to display their resolve to prevent "a great power war" following Russia's invasion of Ukraine.