President Biden on Thursday vowed to "hunt down" the terrorists responsible for a spate of deadly bombings at the Kabul airport which left 12 US servicemembers dead and 15 wounded.

"Know this; We will not forgive. We will not forget. We. will hunt you down and make you pay," he said.

In a surreal press conference that included bible quotes, a moment of silence, and blaming President Trump, Biden said he was open to sending US forces back into Afghanistan to assist with the withdrawal.

"Whatever they need, if they need additional force, I will grant it," he said, adding that the US military can target ISIS-K without "large scale military operations."