. >> we walked along with captain hollingsworth and javon wilson. >> each one has been tested. >> the new firework concern coming from the northern virginia regional intelligence center. it's warning law enforcement terrorists could be trying to get their hands-on these to make potentially deadly improvised explosive devices. in 2010, firework components were used in a foiled car bombing plot in times square. more recently, gunpowder taken from fireworks sparked the deadly boston marathon bombing. this is what federal agents recovered. law enforcement looking for those buying a large amount of fireworks or anyone who may have disassembled fireworks. they're also looking closely for injuries, burns or odors on the person or in the residence and even plans drawings or sketches of public places. no matter what the threat, captain hollingsworth doesn't want fear to extinguish the celebration, stressing caution. >> at the end of the day, trying to make sure everybody is safe. >> no specific threat to anything in northern virginia. just a warning to be vigilant. we ran through some lists of

. >> next on "after words", hollingsworth versus kerry which considers the constitutionality of proposition eight. >> so you have written an account of this in san francisco where two couples challenge the ban on same-sex marriage and so. >> and it is my great pleasure to be here today. i really got into this thinking about this after i read 136 days and if it is part of this this opinion looks different and the kind then what i saw before. and it was this thoughtfulness that intrigued me. so i talked about it in 13 volumes. and so when i first started reading it i had the experience of falling into the transcript it's an experience that i think many readers have and i thought this was the conversation that the nation has been struggling to have come of this is the most comprehensive, the most rigorous and thoughtful discussion of the topic. but i think that we have ever had as a nation. i think that that is something that we will ever have is a nation. >> you know early on in the book, we talked about the virtues of civil trials. and to some degree there are not many civil trials anymore.

. >> next on "after words", hollingsworth versus kerry which considers the constitutionality of proposition eight.

. >> we walked along with captain george hollingsworth and javon wilson, fourth of july is an extreme ly busy time for them. >> we want them intact and in good shape. they do a good job of making sure they sell good products a at all these stands. >> police are being asked to keep vigilant. there are certain signs that they're looking for when they're looking into potential threats. i'm going to run through that list for you when we see you ahead at 6:00. things that you may benefit from as well. jim? >> david, thanks so much. from fresh fruit to fresh fish. some new food ongss are coming to our national mall. authorized to sell food on the nation's front lawn is expanding the menu at six kiosks. some items will be healthier. around the lincoln memorial you'll find fruit and cheese plates and hummus and veggie burgers and hamburgers. by the museums of natural or american history, the options will include pizza and barbecue. that's where i'll be hanging out. near the air and space museum, you'll be able to get grilled chicken, even seafood. wendy. >>> one of the last old time hardware

chad hollingsworth is the vice president of triax. >> about 10 million women play soccer in the u.s.instead it downloads hit statistics in realtime to a computer or mobile app. that data measuring things like force and rotation has been analyzed by users doctors, and researchers. wambach sometimes wears it during training. >> the idea is how many small hits are too many. so in the future you could have a limit for how many hits someone's allowed to take in a week, a month, or a season. >> reporter: new technologies can track and they can also protect. defenderally krieger has had two concussions. this season she's wearing a protective head band during games. it's made from military material like kevlar. its creators say the band helps minimize the impacts that lead to injuries. >> there are potential gains. there's also a potential downside in that players may have an increasing sense of invisibility if they're using protective equipment and playing in perhaps a more aggressive means. >> dr. james noble is a concussion specialist. he says women suffer from them at higher rates than m