And people are still adding new songs to that folk tradition, from Lauryn Hill's "Black Rage," to Kendrick Lamar's "Alright," a hip-hop song that emerged as a popular choice for ... our hands up high ...

DJ Khaled sets the tone with a prayer for protection "as we keep our hands up high and scream for justice ... of the civil rights movement's most popular songs, an unofficial anthem so pervasive ...