https://warontherocks.com/a-canary-in-the-coal-mine-for-u-s-global-leadership/
A Canary in the Coal Mine for U.S. Global Leadership?
Apr 7, 2026 - As recently as the 1980s, coal miners would carry a canary with them as they dug their quarries deep in the earth. Canaries are sensitive to toxic gases
a canary in the coal minefor u