Colin Powell, the first African American chairman of the Joint Chiefs of Staff, criticized the fact that a Florida jury found George Zimmerman not guilty of murder in the death of Trayvon Martin. "I think that it will be seen as a questionable judgment on the part of the judicial system down there, but I don't know if it will have staying power," Powell said on CBS's Face the Nation on Sunday. Powell's comments came on the 50th anniversary of Martin Luther King Jr.'s "I Have a Dream" speech. Powell also said that President Obama should talk more about race relations in America. "I'd like to see him be more passionate about race questions," Powell said.