Hiroshima

Why did the witness immediately identify the aircraft as American?

• It had distinctive American markings.

• Japanese aircraft were not capable of flying at such a high altitude.

• The plane was flying a known American flight path.

• He recognized the specific model of the bomber.

What was the initial assumption of the witness upon seeing the single aircraft above Hiroshima?

• It was a reconnaissance mission.

• It was an American plane on a bombing run.

• It was an ordinary plane just passing by.

• It was a Japanese plane on a routine patrol.

Are you enjoying the video lesson?

• Yes

• No

How long did the bomb fall before its time and barometric triggers activated the firing mechanism?

• Approximately 30 seconds.

• Exactly 45 seconds.

• About 43 seconds.

• Less than 10 seconds.

What was the primary method used to initiate the nuclear chain reaction within the bomb?

• A chemical explosive detonated a plutonium core.

• A uranium bullet was fired into a uranium target.

• Two sub-critical masses of uranium were brought together.

• A high-energy laser ignited the nuclear material.