By ensuring that they have an automatic deactivation. https://www.reuters.com/article/us-usa-landmines/u-s-halts-use-of-long-life-landmines-officials-say-idUST

By ensuring that they have an automatic deactivation. https://www.reuters.com/article/us-usa-landmines/u-s-halts-use-of-long-life-landmines-officials-say-idUSTRE71D6F020110214 https://www.reuters.com/article/us-usa-landmines/u-s-halts-u... "While retaining stockpiles, the United States has not used persistent mines for some time. The last field of persistent mines under U.S. control was in Guantanamo, Cuba, and was removed in 1999, the State Department official said."