The Cultico storyline refers to the 1984 Bhopal disaster, where a major gas leak in a local chemical plant owned by a US corporation caused the death of thousands and injured many more.
The title refers to a journalistic means, describing whether or not a war the US is involved in has the support of the public. Dover Air Force Base houses a mortuary center and is one of the landing points for war casualties returning home, whose arrivals have frequently been filmed over the years, to varying public response.
The military hospital at Walter Reed, located in Washington, DC, closed in 2011 and was supplanted by the National Naval Medical Center, located in Bethesda, MD, just north of the city. The new name of the Medical Center is the Walter Reed National Military Medical Center.
In the episode The Ticket (2005) (first episode seventh season) Annabeth (Kristin Chenoweth) corrects Leo (John Spencer) how to pronounce "Santos". The assistant answering the phone in Congressman Santos (Jimmy Smits)' office apparently never got the same lesson because he pronounces it wrong in this episode.