Two teenage boys saved two children, aged 9 and 12, from drowning while swimming at Herolds Bay beach in George, Western Cape.The National Sea Rescue Institute (NSRI) said the teenagers, believed to be aged 15 and 18, were swimming in a lifeguard-protected area when they saw two children being swept away in the rip current and went to assist them.NSRI spokesperson, Craig Lambinon said lifeguards also rushed in to save the children.”One lifeguard who had gone beyond the breakers, searching to make sure that there were no additional casualties, stayed afloat offshore to make sure that there…