ALBANY - The city should slash the number of people who are allowed to carry concealed weapons, Mayor Bloomberg said yesterday. "We've taken a look at it to see whether we couldn't have fewer," Bloomberg said. "I can tell you one thing: We will keep it to as a minimum as we possibly can." Bloomberg added that he has asked Police Commissioner Ray Kelly to tackle the issue. "If you want a gun permit, you should have to really show that your life is in danger, and that having a gun will protect you, will improve the chances of you...