Charleston shooting: Obama on guns and race at Rev Pinckney funeral

US President Barack Obama has called on the US to "ask tough questions" on race relations and gun control in a eulogy for one of the victims of the Charleston shootings, the Reverend Clementa Pinckney.

The tragedy has reignited debate about both issues and sparked a backlash against the Confederate battle flag, after the suspected gunman, Dylann Roof, was pictured with one.

The president said the US had for "too long been blind" to past prejudices.

North America editor Jon Sopel reports.