Opening for British metal legends Iron Maiden isn’t for the faint-hearted, particularly at the London Stadium—in front of 80,000 fired-up metal fans! But Halestorm have never been a band to flinch in the face of pressure. On Saturday night at London Stadium, the Pennsylvania rock veterans delivered a blistering, defiant set that not only won over the die-hard metal faithful but teased the future of a band still ascending.