Iran has begun an airborne attack against Israel. President Biden is being regularly updated on the situation by his national security team and will meet with them this afternoon at the White House. His team is in constant communication with Israeli officials as well as other partners and allies. This attack is likely to unfold over a number of hours. President Biden has been clear: our support for Israel's security is ironclad. The United States will stand with the people of Israel and support their defense against these threats from Iran.
Joseph R. Biden, Statement by NSC Spokesperson Adrienne Watson on Attacks Against Israel Online by Gerhard Peters and John T. Woolley, The American Presidency Project https://www.presidency.ucsb.edu/node/371183