At the heart of the land-based leg of US' nuclear triad is the LGM-30G Minuteman III, which has continued to remain on constant alert for more than five decades and would eventually be replaced by next-generation Sentinel system.

US nuclear triad: How Minuteman III became a pillar of America’s strategic deterrence

It was designed for rapid response and long-range reach and has served in this role continuously since June 1970, helping to deter nuclear attack against the United States and its allies.

'Speeding over 24,000 km/h': 7 key facts about the US’ Minuteman III intercontinental ballistic missile

Based on range, the ballistic missiles are generally classified as short, medium, intermediate or long-range, with ICBMs falling into the final category, that exceeds 5,500 kilometres. ICBMs have the ability to strike targets across the globe.

'Flying over 5,500 km': What are intercontinental ballistic missiles and why they remain central to global security

It refers to the ability to launch nuclear weapons from land-based missiles, submarine-launched missiles and strategic bombers. Very few states have reached this level because it demands decades of technological investment, vast financial resources and strategic clarity.

Only 4 countries have the ultimate nuclear weapon advantage. Who controls the world’s nuclear triads?

The test of an unarmed nuclear-capable missile was conducted by the Air Force Global Strike Command from Vandenberg Space Force Base in California. The codemane of the test was GT 254, which went off successfully. 

Doomsday countdown? US test-fires Minuteman III missile days after Trump’s nuclear vow — What it means

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US nuclear triad: How Minuteman III became a pillar of America’s strategic deterrence

Speeding over 24,000 km/h: 7 key facts about the US' Minuteman III

'Flying over 5,500 km': What are intercontinental ballistic missiles?

Only 4 countries have the ultimate nuclear weapon advantage

US test 'doomsday' missile days after Trump’s nuclear vow — What it means?