Analysis of information sources in references of the Wikipedia article "B61" in Danish 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.
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.