work. and how clearance was granted to navy yard shooter aaron ñkóalex jack king explains the investigation. >> how wellçis the background check and security accomplished? they will have plenty of evidence to determine that quality of work and s+uqsrh that problem is. they should be able to fix it. >> law makers saidñr therñ need to be a ñithorough review while hiring federal contractors, harris, back to you. >> elizabeth, thank you and 12 people were murdered on the washington navy yard and tomorrow, a programming note for you. there is a ceremony honoring those victims. the first family president obama and his wife are scheduled to visit the barracks there and the president is scheduled to speak. watch our coverage beginning at 4:30 p.m. oastern.