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How to respond if Syria resorts to chemical weapons

The U.S. has said Syria would be crossing a 'red line' if it resorts to chemical weapons in its civil war. But how real and risky is the prospect of a military response by the West.
A Syrian army tank is seen in the Khan al-Raslan neighbourhood of Syria's northern city of Aleppo on Oct 8, 2012. Western countries are mulling their possible actions in the event that Syria should deploy chemical weapons against rebel fighters. (STR/AFP/Getty Images)

While U.S. President Barack Obama haswarned of serious consequences if the besieged Syrian government should deploy chemical weapons Secretary of State Hillary Clinton has said it would be crossing a "red line"there have so far been few specifics on how the U.S would respond to the situation.

Implied in those warnings is the threat of some sort of military action, whichitself presentsa number of options,challenges and risks, foreign affairs analysts say.

On Tuesday, U.S. Defence Secretary Leon Panetta indicated thatSyria'sBashar al-Assad regime may be heeding these warnings from the international community and appears to haveslowed preparations for the possibledeployment of chemical weapons.

'You couldsee something like an effort to destroy Assad's airforce. You could see thatin combination with destructionof Assad's integrated air defence system, along with the establishment ofa no-flight and no-drive zone.' Christopher Chivvis, RAND corporation

Last week U.S. officials said there was evidence that Syrian forces had begun preparing sarin gas for possible use in bombs. Syria is said to have one of the world's biggest stockpiles of the deadly gas.

Still, the international concernregarding Syria's chemical weapons remains high, and means thatcontingency plansare still being developed to attack suspected sites if Assad ever decides to unleash his arsenal.

If Western powers dorespond, "they have to act fast and the way they can do that is basically two options: either through air strikes or cruise missile strikes," said Omar Lamrani, a military analyst for Stratfor, a global intelligence company. Those two choices, he said, represent "the safest option."

Although an air or missile strike would lessenU.S casualties, Lamrani said it could also increasethe risk of contaminating those sites where chemical weapons are stored.

"Blowing up these areas, a lot of the material may be incinerated but there will still be significant risk of leaks and gas clouds," he said.

Regime's arsenalbelieved to contain sarin

According to a Stratfor analysis, the regime's chemicalarsenal is believed to contain sarin, VX, tabun and mustard gas, with one source estimating 650 metric tonnes of sarin and 200 metric tonnes of mustard gas.

The weapons, scattered arounddozens ofsites, could be deployed from artillery, aircraft and ballistic missiles,including different types of Scud missiles.

The Syrian governmenthasnever confirmed it has chemical weapons, but has insisted it would never use such weapons against its own people.

Syria is not a signatory to the 1997 Convention on Chemical Weapons and thus is not obliged to permit international inspection.

If the West suspects chemical weapons are being introduced to the battlefield,it wouldalsolikely hit hard at regime elements and regime leadership, to break down the command and control infrastructure and prevent the coordination ofany chemical weaponattacks, Lamrani said.

The Syrian government of Bashar Assad has never confirmed it has chemical weapons, but has insisted it would never use such weapons against its own people. (Syria TV/Associated Press)

Christopher Chivvis, senior political scientistof RAND corporation, a global policy thinktank, said the U.S. would also want to do something that both helps the opposition and penalizes the regime.

"Soyou couldsee something like an effort to destroy Assad's airforce. You could see thatin combination with destructionof Assad's integrated air defence system, along with the establishment ofa no-flight and no-drive zone."

But none of thisguarantees that all the chemical weapons stockpiles would be destroyed, or that the remaining weapons wouldn't fall into the hands ofsomeal-Qaeda linked groups, which are also in Syria fighting on the rebel side.

If this fear were strongly held, it would likelynecessitatethe more risky and least politically palatable option ofsending in ground troops.

Possibility of ground troops

The Pentagon has estimated that around 75,000troops would be neededto secure the entire chemical warfare infrastructure for Syria.

"They would have to go in with transport aircraft, theyd have to go onto the ground, fight theirway into the facilities that no one really knows how they are laid out," Lamrani said. "You need a lot of expertise in actually securing the material."

Anthony Cordesman, an analyst at the Centre for Strategic and International Studies in Washington, said in an interview with the Voice of America that those troops would haveto battlethe elite Syrian forces assigned to guard thechemical weapons sites.

Cordesman said most of those sites are "heavily defended" by Assad loyalists. He added that Syria's sophisticated air defences also could pose a threat to an aerial commando strategy.

"There is no way you can move aircraft into the areas without being detected by radar. So even special forces raids could have serious problems just in getting to a facility undetected."

Thomas Donnelly, a defence and security policy analyst for the American Enterprise Institute, said another challenge would be securing weapons that are not at the sites, but have been deployed to specific regimetroops.

"As the weapons move from central storage facilities to units in the field,the military tasks grow and grow exponentially, just finding all those things in a timely way," he said.

Canada still shy of commitment

Then, there are the geo-political considerations and the questions ofwhat countrieswould be involved in such an effort to respond against Syria.

On Tuesday, Foreign Affairs Minister John Baird stopped short of confirming that Canada would use its military to be part of a NATO force if Syria resorts to chemical weapon use, butsuggested that Canada likely would be part of an international coalition.

"It's very unlikely[the U.S.] would do it in an unilateral capacity," Chivvis said."[They'd] try to get regional powers, Turkey and Saudi Arabia and other Gulf states involved, with U.S providing specific tasks that need to be done to secure the chemical weapons."

With up to 40,000Syrians believed to have been killed since the uprising against Assad began in March 2011, some may question why the use of chemical weapons would be the trigger for U.S. involvement.

But Chivvis said there's "symbolic damage" to allow a country to use these weapons.

"To date, there's been a pretty strong taboo on the use of chemical weapons over the course of the last century. They have been used from time to time, in the Iran-Iraq war most significantly, but in general there's been a taboo on using them.

"Soanything that would break that taboo could mean a very different kind of security context in the future. So there are good reasons to deter a regime like the Assad regime from using them."

With files from The Associated Press