Marine Chief Warrant Officer 5 Domah Diggs, CBRN Warrant Officer Basic Course director, addresses recent graduates of the Interservice Training Review Organization-Chemical, Biological, Radiological, Nuclear Warrant Officer Basic Course. - Marine Chief Warrant Officer 5 Domah Diggs, CBRN Warrant Officer Basic Course director, addresses recent graduates of the Interservice Training Review Organization-Chemical, Biological, Radiological, Nuclear Warrant Officer Basic Course.