President Joe Biden said Wednesday the U.S. is sending more anti-aircraft, anti-armor weapons and drones to Ukraine to assist in its defense against Russia

The president's comments came as he formally announced his administration was sending an additional $800 million in military assistance to Ukraine, making a total of $2 billion in such aid sent to Kyiv since Biden took office more than a year ago. About $1 billion in aid has been sent in just the last week.

“We’re going to give Ukraine the arms to fight and defend themselves through all the difficult days ahead," Biden said.

Biden spoke hours after Ukrainian President Volodymyr Zelenskyy delivered a video address to members of U.S. Congress in which he made an impassioned plea for the U.S. and West to provide more help to save his young democracy than world leaders have so far pledged to provide.