this was the same shooting where officer ashley gwynden was killed just two weeks ago. the officer served in the marines before becoming a police officer. >> and it is not just smoking anymore. a new study says certain carbs can increase your risk for lung cancer. and that includes white breads, rice, potatoes. even popcorn. scientists believe that frequent blood shu car spikes can affect the way cells grow. >>. >> it's resistance in the south and these leads to potenti potentially-leading gross factor. >> doctors say it's way too early to say that white bread causes kanszer. but it's a good idea to eat a lean diet with lots of fruits and vegetables and whole grains. >> pregnant women not travel to areas where there's zika outbreaks. sexual transmission is more common than previously thought. >> metro says it will scale back its track work during cherly blossom season. metro does help it ease construction. that's the peek of rush hour. and try to avoid the smithsonian station, if you can. consider the archives, arlington cemetery or federal triangle station, instead. is