The Army said that it has finished draining and destroying all rockets with the liquid form of the deadly nerve agent sarin at Anniston Army Depot.
Officials say more than 34,000 of the rockets have been destroyed.
The next step for the Army's weapons incinerator will be to destroy rockets containing sarin that has gelled into a solid form.
That requires a different process, and incinerator spokesman Mike Abrams says the Army is still waiting for state environmental regulators to approve the procedure.
He says it's not necessarily a more dangerous process.
Abrams says he can't say how many of the solid-form sarin rockets must be destroyed. But he said it's a relatively low number compared to the rockets that already have been handled.