The official kickoff of the Kentucky Derby – and one of the key components of the greater Kentucky Derby Festival – Thunder Over Louisville lights up the sky with a phenomenal airshow and fireworks display set along the Ohio River. As the largest annual fireworks display in North America, this popular family-friendly outing promises to be a guaranteed blast for all who attend.The official kickoff of the Kentucky Derby – and one of the key components of the greater Kentucky Derby Festival – Thunder Over Louisville lights up the sky with a phenomenal airshow and fireworks display set along the Ohio River. As the largest annual fireworks display in North America, this popular family-friendly outing promises to be a guaranteed blast for all who attend.The official kickoff of the Kentucky Derby – and one of the key components of the greater Kentucky Derby Festival – Thunder Over Louisville lights up the sky with a phenomenal airshow and fireworks display set along the Ohio River. As the largest annual fireworks display in North America, this popular family-friendly outing promises to be a guaranteed blast for all who attend.