Intelligence Agency limited its public assessment to just noting that "Iran has a large and growing commercial chemical industry that could be used to support a chemical agent mobilization capability." Iran is a signatory of the Chemical Weapons Convention, which bans chemical weapons, delivery systems, and production facilities. Iran has reiterated its commitment to the CWC and its full support for the work of the OPCW, in particular in view of the considerable suffering these weapons have caused to the Iranian people. Iran has not made any declaration of a weapons stockpile under the treaty. In 2013 Ahmet Uzumcu, the Director-General of the OPCW, hailed Iran as an effective and active member-state of the OPCW. In 2016 Iranian chemists synthesised five Novichok nerve agents, originally developed in the Soviet Union, for analysis and produced detailed mass spectral data which was added to the OPCW Central Analytical Database. Previously there had been no detailed descriptions of their spectral properties in open scientific literature. Delivery systems Missiles A Shahab-4 with a range of 2,000 km and a payload of 1,000 kg is believed to be under development. Iran has stated the Shahab-3 is the last of its war missiles and the Shahab-4 is being developed to give the country the capability of launching communications and surveillance satellites. A Shahab-5, an intercontinental ballistic missile with a 10,000 km range, has been alleged but not proven to be under development. In 2017, Iran tested the Khorramshahr, an MRBM that can carry an 1800 kg payload over 2000 km. Iran has 12 X-55 long range cruise missiles purchased without nuclear warheads from Ukraine in 2001. The X-55 has a range of 2,500 to 3,000 kilometers. Iran's most advanced missile, the Fajr-3, has an unknown range but is estimated to be 2,500 km. The missile is radar evading and can strike targets simultaneously using multiple warheads. On 2 November 2006, Iran fired unarmed missiles to begin 10 days of military war games. Iranian state television reported "dozens of missiles were fired including Shahab-2 and Shahab-3 missiles. The missiles had ranges from 300 km to up to 2,000 km...Iranian experts have made some changes to Shahab-3 missiles installing cluster warheads in them with the capacity to carry 1,400 bombs." These launches come after some United States-led military exercises in the Persian Gulf on 30 October 2006, meant to train for blocking the transport of weapons of mass