In 2003, T.I. and other Atlanta rappers created new subgenre of rap: trap music. Twenty years later, its influence is everywhere. JUANA SUMMERS, HOST: About two minutes into the song, "Y'all ...

The dope-boy flows and warm 808s set the unbeatable standard for all other trap joints. Sure, Shawty Redd produced a proto-trap hit (Atlanta rapper Drama’s 1999 missive, “Left, Right, Left”).