waiting periods, evidence suggests, can save lives and don t infringe on the rights of law-abiding gun owners. there are other things that can work but fwheed to test them. we don t know if arming teachers will work or kill more people. we need to test it. it s interesting to make policy on short of people s feelings and buffermper sticker. the president said he thought it made sense to raise the age to which you can buy an assault tile weapon to 21. he has tweeted this morning there s not much political support for raising age limit to purchasing guns. what do you read from that? is that true? have they tested that in congress? reporter: they tested in it congress after the newtown scootings. there s not been the will and it s not just on the side of the republican.