In the latest episode (S08E04) of Game of Thrones
the second of her three dragons is killed by a ground to air missile.
This isn't the first time this type of attack has been used.
In fact the Lannisters' have used the same weapon before to injure her dragon while she was riding it. Also the Night King has used spears several times to first kill one dragon and then attack the other two.
Why is Dany so clueless when it comes to these attacks? Surely given the history of them being used against her and her dragons she would show a bit of caution when approaching areas likely to be defended against her. But instead she flies in relatively low and bunched up, making her an easy target.
It's as if she has put no thought at all in to air to ground combat tactics or how to protect her dragons from these weapons.