Argentina: Missing sub could be out of oxygen soon

Worried relatives of 44 missing Argentine submariners were comforted Tuesday by banners and the support of countrymen who gathered outside a naval base here. For now, all they can do is wait, hope and pray the crew will be rescued. But time may not be on their side. In a worst-case scenario, the submarine ARA San Juan may run out of oxygen by Wednesday -- if it has been unable to garner a fresh supply of air at the surface.
Read more: http://edition.cnn.com/2017/11/21/americas/argentina-missing-submarine/index.html?source=Snapzu