Sen. John McCain, R-Ariz., flooded his Twitter account Wednesday with graphic photos showing atrocities allegedly committed by the Assad regime in Syria.

"These images haunt me, but what haunts me more is thought that we'll continue to do nothing #Syria," McCain said in one of the tweets, which showed a photo of a child whose legs appeared to be badly injured.

McCain also showed giant versions of the photos propped up on easels on the Senate floor during a speech today.

My floor remarks on mass atrocities by Assad regime vs the people of #Syria - a stain on our conscience: http://t.co/B1xT7UGHSl

- John McCain (@SenJohnMcCain) February 12, 2014

"When the images and horrors of this conflict occasionally show up on our television screens, the impulse of many Americans is to change the channel," McCain said on the Senate floor. "But we must not look away. We must not avert our eyes from the suffering of the Syrian people - for, if we do, we ignore, we sacrifice that which is most precious in ourselves: our ability to empathize with the suffering of others, to share it, to acknowledge through our own sense of revulsion that what is happening in Syria today is a stain on our the collective conscience of moral peoples everywhere.

"These images of the human disaster in Syria haunt me. And they should haunt all of my colleagues and all Americans," McCain later added. "But what haunts me even more than the horror unfolding before our eyes in Syria is the thought that we will continue to do nothing meaningful about it, and how that deadens our national conscience, and how it calls into question the moral sources of our great power and the foundations our global leadership."