The remediation of Da Nang Airport, initially envisioned as a modest technical exercise, evolved into a complex, multi‑year operation; Senator Leahy was instrumental in securing continued US congressional appropriations, while Vietnam assumed the lead in coordinating, supervising, and overcoming logistical obstacles.

The clean‑soil box was deliberately offered as incontrovertible proof that the once‑poisoned terrain had been restored, and simultaneously as a diplomatic missive signalling that the two nations could translate technical success into mutual confidence.

On March 23 2021, Senator Leahy rose on the Senate floor to honour General Nguyen Chi Vinh—a rarity for a foreign military officer—thereby underscoring the personal diplomatic partnership that had underpinned the remediation effort.

Three years later, on September 10 2023, Vietnam and the United States elevated their bilateral framework to a Comprehensive Strategic Partnership, explicitly designating war‑legacy remediation as a cornerstone for cultivating enduring mutual trust.