Apparently Biden and Holder met last year with some people trying to figure out how a gun owner would be the only one to fire his weapons, whether it be through finger-print recognition or gun bracelets:
Say an intruder breaks into your home. The last thing you want to fiddle with is trying to get the gun to recognize your fingerprint or worse, trying to find your ‘gun bracelet’. I don’t see anyway these ideas are compatible with protecting yourself. If you can’t just pick up your gun and start shooting, then you may as well be dead.
(h/t: PJ Tatler)