tisha thompson has our report. >> reporter: next time you go to your pharmacy, peek around the counter. you might see a large machine tucked behind a shelf that is a pharmacy robot. it's supposed to make medicine safer. but the news4 i-team is going to show you how these machines can multiply one mistake into dozens. >> they provide a valuable service. >> reporter: carmen is the executive director of the national association of boards of pharmacy and says more and more large chains are using pharmacy robots. >> the robot holds your top 200 fastest moving tablets and capsules. >> reporter: in this video from a prom meant robot maker you can see how a pharmacist types a prescription in. a robotic arm pulls pills from a cell, place them in a bottle and labels it. >> each robot comes standard with an open control center. >> they can help with dispensing. and the error rate is significantly lower than if you have technicians or even pharmacists sometimes filling prescriptions. >> reporter: dr. sydney wolf at the watchdog public citizen says there have been two respected medical studies that

tisha thompson, news4 i-team. >> to hear more from pharmacists about what goes on behind the counter our website nbcwashington.com and click on investigations. >>> and a woman had to be helped off of a trail near a creek. she was jogging near melvin trail when she slipped and fell down the ravine, and she could not get out, because she needed help, but rescue crews managed to get her out. >> and she must have had the phone with her when she was running. >> yes, always a good idea. >> and talk about the time line. >> yes, two fast-living events, and the number starts around 1:00 a.m. tomorrow morning and could start as late as 3:00 a.m. right inside of the belt way and d.c. and the fact is that we have more light snow that could be problematic for tomorrow. we are seeing the clearing now with the day's events, but let's waste no time. areas of snow between 3:00 a.m. and 11:00 a.m., and that is when most of it will fall, and again, it is mainly light snow, and what is going to come down is going to come down when the temperatures are low, and that means that the roads are going to be s

. >> reporter: in washington, tisha thompson. >> u.s. fish and wild life wants congress to change laws to include animal trafficking for organized crime. >>> next at 11:00 customers forced into a vault as robbers took over a local bank. we will have the surveillance video. >>> plus count down to the >>> p[ male announcer ]the at northrop grumman, we've always been on the forefront of innovation. when the world called for speed... ♪ ...when the world called for stealth... ♪ ...intelligence... endurance... affordability... adaptability... and when the world asked for the future. staying ahead in a constantly evolving world. that's the value of performance. northrop grumman. >>> a bank robbery played out like a scene from a movie. the pair held up the bank. customers forced into the vault as the robbers made out with the cash. investigators tell us there have been 28 bank robberies in northern virginia since october. >>> new details about a potential terror attack surrounding the olympics. u.s. homeland security officials are warning about