By Steve Holland and Mike Stone WASHINGTON (Reuters) -President Joe Biden instructed the U.S. State Department to release up to an additional $350 million worth of weapons from U.S. stocks to Ukraine on Friday as it struggles to repulse a Russian invasion. In a memorandum to Secretary of State Antony Blinken, Biden directed that $350 million allocated through the Foreign Assistance Act be designated for Ukraine’s defense. Ukraine has been asking for Javelin anti-tank weapons and Stinger missiles to shoot down aircraft. On Saturday, Blinken said in a statement that this third authorization for …