Analysis of information sources in references of the Wikipedia article "B61 nuclear bomb" in English language version.
Of the LASL devices currently entering stockpile, the B61-3 and B61-4 do not contain beryllium. The B61-5 does, but the B61-3 could probably be substituted for it.
ACM[EPW]/W61 schedule for which Phase 2A has been completed (Phase 3 is planned in the next few months) and will permit the removal of the B53 from standing alert.
Of the LASL devices currently entering stockpile, the B61-3 and B61-4 do not contain beryllium. The B61-5 does, but the B61-3 could probably be substituted for it.
ACM[EPW]/W61 schedule for which Phase 2A has been completed (Phase 3 is planned in the next few months) and will permit the removal of the B53 from standing alert.