(1) Indeed, fusion bombs and warheads must be periodically disassembled and recharged with fresh tritium.

(2) Pure fusion bombs might be much smaller than existing bombs.

(3) Edward Teller, in particular, believed the fusion bomb to be theoretically possible.

(4) The biggest fusion bomb ever detonated — the Soviet Union's Tsar Bomba, tested in 1961 — released energy equivalent to an estimated 50,000,000 tons of TNT.

(5) Some sources say it can be used to make a devastating, pure nuclear fusion bomb. Others say it's an urban myth.