I work at the Salk, right next to the glider port mentioned. I saw no activity yesterday afternoon (when I go out to smoke I am on the same side of the building as the glider port), and have heard nothing about an accident.
The fact that this supposedly happened yesterday (the accident happened at 2pm, it's only 12 now), and no news has broken yet should be strong evidence that it is bogus. Plus, if you want to get an idea of the reliability of the site, look at other stories on the site.
Playing with yeast to help you live longer!
My e. coli cures cancer!