A deal is taking shape for the U.S. and Ukraine to jointly develop and build weapons that have been at the forefront of the wars in both Ukraine and Iran.

Ukraine -- at war for more than four years -- has become the envy of some of the world’s most powerful militaries in combating long-range drones. But at the same time it is uniquely vulnerable to Russian missiles,

KYIV, Ukraine (AP) — Russia fired at least 800 drones in a massive daytime barrage on about 20 regions of Ukraine on Wednesday, killing at least six people and wounding dozens, including children, in one of the longest attacks by Moscow in the 4-year-old war, President Volodymyr Zelenskyy said.

In only four years after the Russian invasion, Ukraine went from being a country knocked back on its heels and scrambling for military aid to emerging as a leading provider of battlefield-tested counter-drone expertise and exporter of anti-drone weapons systems.

The ban extends even to government agencies and emergency services, with only the defense ministry and mayor's office allowed to make posts.

Russia on Thursday unleashed a third straight day of massive drone and missile attacks on Ukraine, demolishing an apartment building in Kyiv where nine people were killed and

Ukraine is using drones to impose siege-like conditions on Russian units, cutting them off from resupply. This is clearly seen in the current operations around Mariupol.

Ukraine has a powerful and growing fleet of ground robots and flying drones, and using their different abilities together is unlocking new potential.