caitlyn nordin and steve burn.ties say they have made significant progress in the boston terror investigation. there is a lot they are not sharing, obviously. the question is how much closer are they tonight to cracking the case or where are they on the case coming out? we'll give you the latest information that we have. [ male announcer ] alka-seltzer plus presents the cold truth. i have a cold, and i took nyquil, but i'm still "stubbed" up. [ male announcer ] truth is, nyquil doesn't unstuff your nose. what? [ male announcer ] it doesn't have a decongestant. [ male announcer ] purpose elevates what we do. raises it to a more meaningful place. makes us live what we do, love what we do and fills our work with rewarding possibility. aarp connects you to a community of experienced workers and has tools to help you find what you're good at. an ally for real possibilities. aarp. go to aarp.org/possibilities. >>> as we reported at the top of the hour, the fbi cancelled the news briefing tonight on the terror investigati