Tensions rise between US and Russia over drone collision in Black Sea.

Ukrainian President Volodymyr Zelensky vows to hold Russia accountable for the bombing of a theater in Mariupol that killed hundreds of people. Meanwhile, Ukrainian soldiers show the wreckage of a weaponized drone, a Chinese-made Mugin-5, which they said they shot down with their AK-47 automatic weapons over the weekend. US officials say they likely will not be able to retrieve the drone forced down by Russian jets in the Black Sea. Russian forces have reached the MQ-9 crash site, according to two US officials, as the Kremlin promises to attempt to recover the US drone.