Emo is a genre of rock music that combines musical characteristics of hardcore punk with emotional, often confessional lyrics. It emerged as a style of hardcore punk and post-hardcore from the mid-1980s Washington, D.C., hardcore scene, where it was known as emotional hardcore or emocore. The bands Rites of Spring and Embrace, among others, pioneered the genre. In the late 1980s, Maryland bands Moss Icon and the Hated adopted and reinvented this sound, putting less influence on its punk roots. In the early-to-mid 1990s, their influence led emo to be adopted by alternative rock, indie rock, and pop-punk bands, including Sunny Day Real Estate, Jawbreaker, Cap'n Jazz, Mineral, and Jimmy Eat World. By the mid-1990s, Braid, the Promise Ring, American Football, and the Get Up Kids emerged from Midwest emo, and several independent record labels began to specialize in the genre. Meanwhile, screamo, a more aggressive style of emo using screamed vocals, also emerged, pioneered by the San Diego bands Heroin and Antioch Arrow. Its dervative form pop screamo achieved mainstream success in the 2000s with bands like Hawthorne Heights, Silverstein, Story of the Year, Thursday, the Used, and Underoath.