is scanning the package. >> reporter: so by now, someone's ordered something, it's been packaged up, and now it's in your hands.d >> that's correct. >> reporter: flight operations e lead evan britton showed us how it's launched. >> next we'll install the parachute and load the package into the payload bay. >> reporter: latches? and the next step is to install the battery. inspection complete, zip line 963. >> roger. watching zip line 963 in three, two, one! >> reporter: for now, these zips, as they're called, are able to drop payloads within a 50-mile raid yous of pea ridge, arkansas. but wal-mart and zip line hope to one day expand the service nationwide. >> if our customers enjoy the service, we'll scale it so in future holidays there is probably going to play a really bick part in get things in a hurry. >> reporter: tom truns delivery operations.