In June 2023, former NGA and NRO intelligence officer David Grusch publicly claimed the US government operates a secret crash retrieval and reverse-engineering program for vehicles of non-human origin. In July 2023, he testified under oath before Congress that the government possesses 'intact and partially intact' craft of non-human origin and 'non-human biologics' recovered from crash sites. He claimed people had been harmed or killed to maintain secrecy. Grusch was deemed credible by the Intelligence Community Inspector General, who found his complaint 'credible and urgent.' The Pentagon denied his claims, stating it found no verifiable evidence of such programs.