mr. benskin, thank you both for your time tonight. please stay safe and know our prayers are with everyone in canada. >> thank you. >>> still ahead, are we safe here at home? after the canada shootings, we'll look at what officials are doing to stop potential homegrown threats in the u.s. plus, the day's other big story, lots of questions tonight about a new version of michael brown shooting by officer darren wilson. stay with us. if yand you're talking toevere rheumyour rheumatologiste me, about a biologic... this is humira. this is humira helping to relieve my pain and protect my joints from further damage. this is humira giving me new perspective. doctors have been prescribing humira for ten years. humira works for many adults. it targets and helps to block a specific source of inflammation that contributes to ra symptoms. humira can lower your ability to fight infections, including tuberculosis. serious, sometimes fatal infections and cancers, including lymphoma, have happened, as have blood, liver, and nervous system problems, se