Reading another post I ran across this sham of a video, and I thought it also related here. The officer says that it is a perrishable skill and you will start loosing it within a couple monthes, but the training for a majority of law enforcement agencies that I have dealt with qualify at most once ever 6 monthes. Notice that there is a big difference between training/practice and qualification.
I also think that it is really ironic that there is a police officer in this video that shoots himself from poor gun handling during a lecture on how he is the only one that should be carrying a gun, to a class of children. You really have to see it to understand.
'If I Only Had a Gun': Click Here for 20/20 Special - ABC News
More specifically the video of the officer shooting himself.
YouTube - DEA Agent