Alan Rock's Trivia!

Questions:

1)  On this date in 1963 the U.S. Postal Service began using zip codes. "ZIP" is an acronym that stands for what?

2)  On this date in 1945, a plutonium device equivalent to 15,000 tons of TNT became the the first atomic bomb. Where was it detonated?

3)  This television series holds the record for longest running Western.

4)   Mary Baker Eddy was born on this date in 1821.  She is regarded as this movement/organization's founder.

Answers:

1)  "Zone Improvement Plan"

2) Alamogordo, NM. The blast was visible from as far as 180 miles away.

3)  Gunsmoke

4)  the Church of Christian Science