Chris Martin : The cost of gun violence is often hidden away . He says people should see the carnage firsthand so they are stirred to act . We demand that news organizations not show American troops , or even the enemy , lying dead in war zones . After murder of Emmett Till , his battered face was shown on magazine cover . Martin says ourtrage over the Till murder helped fuel civil rights movement .
Chris Martin : The cost of gun violence is often hidden away . He says people should see the carnage firsthand so they are stirred to act . After murder of Emmett Till , his battered face was shown on magazine cover . Martin says ourtrage over the Till murder helped fuel civil rights movement .