Mara Barrett Reporting News Today : Breaking News, Live Updates & Top Stories | Vimarsana

>> that was nbc's mara barrett reporting. next, an update. a story we have followed for more than a year. the murder of an american hero. the president signing an executive order to prevent what happened to vanessa guillen from ever happening again. that update after this. pening an that update after this sorry, one sec. doug blows a whistle. [a vulture squawks.] oh boy. only pay for what you need. ♪liberty, liberty, liberty, liberty♪ before nexium 24hr, anna could only imagine a comfortable night's sleep without frequent heartburn waking her up. now, that dream... . ...is her reality. n...

The country can do it too. >> that's a lot of potential there. >> tons of potential. and really i think one of the things that we like to do is in chicago is we like to experiment and pilot things and then figure out how does that become a systemic change. >> reporter: los angeles has installed about half of the amount of lights as chicago, and some smaller cities like tucson have already made the switch. other cities like philadelphia, boston and pittsburgh are currently developing their streetlight modernization plans. with chicago now signing in a new light, the energy cost of industry ligh...