...oe Biden would have cowered behind a door and shot through the door....
Joe Biden would have made his wife fire two shots from the double barrel off the balcony.
No. Joe Biden famously said in a speech that the way you take care of a gunman coming into your house, is to shoot a double-barreled shotgun through the door - and he held up his arms in a mock pose saying "Blam, blam!". Totally chicken way to deal with an unseen assailant, and cause harm to innocent bystanders or neighbors. You must know your target, identify them, then shoot as necessary - like this brave woman handled the situation. She laid it on thick shooting as they fled out the door, but it was two gunmen firing back at her so she was justified as the threat to her remained.