"The 5.7 is known to..." Only in anti-gun propaganda. The AP bullets, available to LE and military, will penetrate body armor, but so will many other bullets in many other calibers. This is just another go-round on the "cop killer bullet" business. If you want to do the most damage to a human body, plain lead or soft point bullets are much more effective than the so-called "armor piercing" bullets.
But some of the "ban guns" media, aided by a VPC propaganda statement that is mostly a lie, have seized on the "cop killer gun".
The media don't dare tell the truth - that the jihad is alive and well in America and that it is impossible to determine if that nice Muslim who sold you ice cream today is going to set out to kill you tomorrow. The vast majority of Muslims are good, decent people who disavow the jihadists the same way Baptists despise the nutcase prohibitionists and Catholics disavow abortion clinic bombers. But it only takes a few in the right places.
One of the nuttier remarks (CNN Pentagon correspondent) was that military bases need to be closed off to prevent "unauthorized" people from entering. She seemed totally oblivious to the fact that the killer worked on the base and was fully authorized to be there. The media seems to be getting more and more adept at confusing themselves even as they seem to be deliberately trying to confuse and mislead the public.
Jim