Title: Gramophone record.
Question: What year were Durium records no longer released in the US?

Title: Space Race.
Question: What military operation allowed the US to recruit the German engineer, Von Braun?

Title: Railway electrification system.
Question: How long did three-phase system operate in Cascade Tunnel?

Title: Tristan da Cunha.
Question:
In what year was the island hit by an extratropical cyclone?