Swimming induced pulmonary edema

I recall a thread on here sometime in the past year I think about someone having blood tinged frothy sputum production, sob, or something of this nature after a tri swim. I remember someone posting some information regarding swimmining induced pulmonary edema, specifically some experience with Navy Seals or something along those lines. Would really appreciate it if any know what I’m talking about if they could repost it for me or point me in the right direction.

http://www.slowtwitch.com/Training/Swimming/Swimming_Induced_Pulmonary_Edema_SIPE__45.html

it happens
.