across the potomac river, maryland said they will fingerprint gun owners and limit gun magazines to ten rounds. the national rifle association says it s unconstitutional. mostly they re feel good laws but they re dangerous. one thing you shouldn t do you in a democratic society or in any society for that matter is to make policy the height of an emotional kind of feeling. reporter: nowhere is the patchwork problem seen as more serious than the national instant check system for gun purchases known as nics. the dirty secret is the states don t even have to contribute to the nics data base system. reporter: half the states don t pull fully participate. it s a national system that has never been nationwide. if you don t have background checks on all gun sales, everything else is virtually useless. there is no way of tracking it. there s no way of enforcing it. there s no way of holding people accountable to who they sell their gun to. reporter: and the tough thing to change unt
that were bought from outside of our state, not even from within our state which is especially concerning. reporter: gun control has become a war between the states. since newtown, at least six state legislatures have passed tougher gun control measures, more states have acted to weaken gun laws and a couple have done both. in washington, d.c., the nation s capital, they re tough on guns. but neighboring virginia acted to make concealed weapons permits confidential. across the potomac river, maryland said they will fingerprint gun owners and limit gun magazines to ten rounds. the national rifle association says it s unconstitutional. mostly they re feel good laws but they re dangerous. one thing you shouldn t do you in a democratic society or in any society for that matter is to make policy the height of an emotional kind of feeling. reporter: nowhere is the patchwork problem seen as more serious than the national instant check system for gun purchases known as nics. the dirty