Q--Is the CIA part of the Department of Defense?
A--My step-by-step reasoning: The Department of Defense covers national defense and the armed forces, led by the Secretary of Defense. The CIA is a federal agency within the United States Intelligence Community, which answers to the Director of National Intelligence.
So, the answer is no.

Q--Could Saint Peter watch television?
A--My step-by-step reasoning: Saint Peter died in 64 BC. The television was invented in 1900.
So, the answer is no.

Q--Can chemicals in onion help create a thermonuclear bomb?
A--My step-by-step reasoning: A thermonuclear bomb, also called a hydrogen bomb, uses hydrogen under high temperatures to create an explosive reaction. While chopping onions, cells inside the onion are broken and the gas that comes out forms sulfenic acid. Sulfenic acid is composed of several elements including hydrogen.
So, the answer is yes.

Q--Is breast cancer associated with a ribbon?
A--
My step-by-step reasoning: Breast cancer is one of many diseases associated with a specific color of ribbon. Breast cancer's ribbon is pink.
So, the answer is yes.