Exchanges and mutual learning can be a bridge of friendship between peoples, a driver of progress for humanity and a bond of world peace.

应该推动不同文明相互尊重、和谐共处，让文明交流互鉴成为增进各国人民友谊的桥梁、推动人类社会进步的动力、维护世界和平的纽带。

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Arredondo, a peace activist and sometime cabbie and truck driver who was watching the race from the finish line, rushed into the mass of mangled humanity, where a dramatic Associated Press photo caught him pushing a wheelchair with a victim who lost most of his lower legs in the attack.

NPR: Marathon Rescuer Gets Attention From Press And FBI