underground

The campaign begins with a surprise invasion of South Korea by North Korean forces, who deploy paratroopers and infiltrate through an underground tunnel to catch South Korean and US troops off guard.

From Barron's ● Oct. 25, 2026

Analysts estimate Iran has hundreds to thousands of ballistic missiles, and U.S. and regional officials believe it has resumed production of ballistic missiles in limited numbers using stockpiled components and working in underground facilities.

From The Wall Street Journal ● Oct. 23, 2026

"Our approach is to use the right infrastructure in the right place, drawing on a range of technologies including underground cables, wooden poles and our recently announced lower-profile monopoles."

From BBC ● Oct. 23, 2026

Although scientists know that giant caldera volcanoes can erupt more than once, they still have an incomplete understanding of how the enormous quantities of magma required for these events accumulate underground.

From Science Daily ● Oct. 23, 2026

“You tried, this time. But remember—you have no cards except the three for you, Opa, and Tante Betsie. There is no underground activity here, you don’t understand what they’re talking about. . . .”

From "The Hiding Place" by Corrie ten Boom

Glasgow and Budapest opened their undergrounds in 1896, as did Paris in 1900, New York in 1904, and Buenos Aires in 1913.

From Textbooks ● Dec. 14, 2022

This semester, Athey is teaching a class on subcultures and undergrounds at USC’s Roski School of Art and Design.

From Los Angeles Times ● Aug. 25, 2017

New York’s various undergrounds can make for a disciplined apprenticeship, and Gaga takes pride in her earliest fan base of art, fashion and music students.

From New York Times ● Oct. 17, 2016

But he remained a name known primarily to those whose knowledge of the city’s music was steeped in various undergrounds.

From Washington Post ● Jun. 23, 2015

"I'm never sure where these French undergrounds are going to land me."

From The Triflers by Frederick Orin Bartlett