A man covers his mouth with a Skittles candy wrapper he as he marches with protesters in Baltimore, Maryland on April 29, 2015. Thousands of young protesters marched through downtown Baltimore demanding justice for African-American Freddie Gray who died of severe spinal injuries sustained in police custody. African-American youth Trayvon Martin was carrying a packet of Skittles purchased shortly before his 2012 encounter with neighborhood-watch co-ordinator George Zimmerman, who was acquitted of second-degree murder of Martin. AFP PHOTO / Andrew Caballero-Reynolds (Photo credit should read Andrew Caballero-Reynolds/AFP/Getty Images)
