airports in our area are ng beimpacted. aftermath, again, of a transforr explosion, that eerie blue light spanning the whole new york city skyline tonight. just amazing. >> what a sight. that's just crazy. >>> well, many of you use apps to buy and sell things all the time. >> yeah, but one recent transaction ended in an armed robbery, of all things, and police say the perspective buyer holding the gun was a d.c. firefighter. >> darcy spencer is live in silver spring with what was supposed to happen. darcy? >> reporter: well, that's right. the deal went down right her in this area of silver spring back on december 20th. and apparently these two people met on an app o calleder up. and the victim was trying to sell a veryxpensive pair of shoes. he was advertising them for $700. and tgryd to meet up in this area of silver spring at georgia avenue and east west highway. but insteadf getting t money, the victim got a gun in his face. he's a d.c. firefighter facing an armed robbery charge. he's accused of stealing a pair of these