this just came to me and i write it quite quickly so i apologise for any mistakes - hope you like
Tony and Ziva climbed out of the government issued sedan and flipped their sunglasses on automatically. Ziva surveyed the surrounding area to the left while Tony did the same on the right. Ziva stepped round the car and joined Tony. Together they walked towards the house. Tony rapped hard on the door and the pair waited in silence. The door finally opened a minute later. The small man lifted up his thick rimmed glasses and eyes the pair cautiously. Tony and Ziva pulled out their badges and flipped them at the man.
"Fred Warren? My name's Tony DiNozzo, this is Ziva David we work for NCIS"
"National Crop Insurance Services?"
"No-" Tony was quickly interrupted.
"National Coroners Information System?"
"No-"
"The Norwegian Council for Information Science?"
"Actually it stands for-"
"No, I wanna get this" Tony rolled his eyes. Why couldn't Gibbs have sent McGee? "National Coalition of Independent Scholars?"
"Not even close"
"National Construction Insurance Services?" Tony shook his head. "Nebraska career information system?"
"Are you making these up?" Ziva glared at him for that one.
"The Nevada career information system? National Criminal Intelligence Service"
"Getting closer"
"National Centre for Indigenous Studies?"
"Getting colder"
"North Country Internet Service?"
"How do you know all these?" Tony asked incredulously.
"National Contaminants Information System?"
"No"
"The National Cardiovascular Information System?"
"No"
"National Crop Insurance Services?"
"You've said that already"
"Okay then, I give up. What does NCIS stand for?"
Tony opened his mouth to answer but Ziva butted in "Navy Criminal Investigative Service"
"Hmm" The man hummed "Never heard of it"
Just to let you know -all those acronyms are real!