Recent News stories with Officers being stabbed

Here are four recent News stories involving Officers being stabbed.
Note: All of the Officers survived! And in all cases the stabber/bad-guy was taken into custody.  The mind navigates the body:

Things to think about: Re-action time and distances.... In all four instances deadly force by the officers would have been justified. But things erupt very quickly...

Off-duty police officer stabbed during Whittier home invasion
http://www.sgvtribune.com/breakingnews/ci_22442999/man-stabbed-during-possible-home-burglary-whittier

Waukon Police Officer Stabbed

http://www.kcrg.com/news/local/Waukon-Police-Officer-Stabbed-185816321.html

Police: Officer stabbed with screwdriver

http://www.kcci.com/news/central-iowa/Police-Officer-stabbed-with-screwdriver/-/9357080/18033442/-/3c9wd0/-/index.html

Four Officers Stabbed

http://www.youtube.com/watch?v=HHdBxTVFibg