It sounds like Johannesburg during the Apartheid period. Different types of id gave you access to parts of the city based on race.

There is a similar product called Stadium Pal which was reviewed by the author David Sedaris on the Dave Letterman show. It can be purchased online..

The German army marched into Denmark without a shot, not Sweden. Sweden remained neutral during the war.

During World War II, the Swedes made wooden copies of their fast firing Bofor anti aircraft guns and placed them around Stockholm. The Germans photographed them in aerial spying runs. The German Command thought they were real and concluded that the Swedes could wipe out a Luftwaffe attack.The Bofor guns were so fast that they were used against jets in the Korean war.

A recent program on PBS showed the parts of NYC that would be flooded. Wall Street was especially vulnerable. Even a relatively small rise in water levels could threaten if a storm surge occurred. Also mentioned that parts of Miami and southern Florida would be flooded.