American alternative metal musical groups - How Old Today?

1

A_Perfect_Circle

2

Alter_Bridge

2

Black_Veil_Brides

2

Creed_(band)

2

Incubus_(band)

2

Limp_Bizkit

2

Medication_(band)

2

Rage_Against_the_Machine

2

Tremonti_(band)

2

Ugly_Kid_Joe