Daniel Ellsberg, Pentagon Papers whistleblower, dies at 92

In This Story: Nuclear Weapons

A nuclear weapon (also called an atom bomb, nuke, atomic bomb, nuclear warhead, A-bomb, or nuclear bomb) is an explosive device that derives its destructive force from nuclear reactions, either fission (fission bomb) or from a combination of fission and fusion reactions (thermonuclear bomb). Both bomb types release large quantities of energy from relatively small amounts of matter.

A nuclear device no larger than traditional bombs can devastate an entire city by blast, fire, and radiation. Since they are weapons of mass destruction, the proliferation of nuclear weapons is a focus of international relations policy.

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In This Story: Vietnam

Vietnam is a Southeast Asian country known for its beaches, rivers, Buddhist pagodas and bustling cities. Hanoi, the capital, pays homage to the nation’s iconic Communist-era leader, Ho Chi Minh, via a huge marble mausoleum. Ho Chi Minh City (formerly Saigon) has French colonial landmarks, plus Vietnamese War history museums and the Củ Chi tunnels, used by Viet Cong soldiers.

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