Iranian officials on Wednesday reiterated that the country’s ballistic missile program is “not subject to negotiation,” issuing defiant warnings as Prime Minister Benjamin Netanyahu holds meetings in Washington ahead of a second round of U.S.–Iran talks.

Iranian Foreign Minister Abbas Araghchi said bluntly, “No one can cause even the slightest damage to our missiles. Our missiles are not subject to negotiations and will not be.”

Ali Shamkhani, secretary of Iran’s Supreme National Defense Council, went further, accusing Western powers of acting in bad faith.