THE SPRINGFIELD UNION, Mass., Nov. 17, 1952

• Operation "Ivy King" - 1st Hydrogen Bomb tests
• First thermonuclear device - fusion
• Elugelab Island - Enewetak Atoll

The top of the front page has a four column headline: "AEC ADMITS H-BOMB TESTING IN PACIFIC" with subheads. (see images)
Complete with 20 pages, light toning and minor wear at the margins, generally nice.

Conducted during Operation Ivy in November 1952 at Enewetak Atoll, the U.S. nuclear testing series marked a monumental shift in geopolitics and physics: while the November 1 "Ivy Mike" detonation was the world’s first successful full-scale thermonuclear test—utilizing the Teller-Ulam staged fusion mechanism to yield a colossal 10.4 megatons of TNT, vaporize Elugelab Island, and lead to the discovery of elements Einsteinium and Fermium—the November 16 "Ivy King" test detonated a 500-kiloton bomb to secure the record for the largest pure-fission weapon ever exploded as an operational backup. The combined significance of these tests fundamentally altered Cold War defense strategies by demonstrating that fusion could unleash destructive power hundreds of times greater than atomic weapons, accelerating the global arms race and establishing the terrifying reality of thermonuclear deterrence.