---
title: "Andy Weber"
type: "entity"
entity_kind: "person"
status: "hub"
canonical_name: "Andy Weber"
aliases: []
first_seen: "2026-08-27T00:00:00.000Z"
writer_model: "claude-sonnet-5"
connects_to: ["Project Sapphire (1994)","Ulba Metallurgical Plant","nuclear nonproliferation","Cooperative Threat Reduction program"]
seek_code_commit: "7d6d9ed"
---


American diplomat who, on a March 1994 visit to Kazakhstan's Ulba Metallurgical Plant, became the first U.S. official to learn that the plant held an undeclared stockpile of weapons-grade highly enriched uranium — the discovery that, eight months later, led to the covert U.S. airlift known as Project Sapphire. Matters to this vault as the originating figure behind [[claim-project-sapphire-1994-airlifted-kazakh-heu-declassified-report|Project Sapphire]], the operation this vault's nonproliferation cluster treats as a materially significant tributary to [[claim-megatons-to-megawatts-475t-heu-one-third-us-reactor-fuel|Megatons to Megawatts]].

## References
- [[claim-andy-weber-discovered-ulba-heu-stockpile-march-1994]]
- [[claim-project-sapphire-1994-airlifted-kazakh-heu-declassified-report]]