I think it has to do with incidents of soldiers in Iraq and Afghanistan shooting bad guys with their berettas, loaded with pathetic 9mm full metal jacket ball ammunition, and having to follow up with five and six extra shots to make the bad guy dead.
I am very aware of why the services decided to go back to the .45, my question is if this story has any real legs. To date I have not heard anything but full speed ahead with the Big Army .45 buy and small hiccup with SOCOM buy. Difference between the two the need or no need for an external safety. This article alleges that both programs have been stopped.