Western powers are preparing for possible strikes against Syria over the purported use of chemical weapons last week that activists and an aid group say killed more than 300 people.
The Syrian opposition blames President Bashar Assad's regime for the attack. The government denies the charges and instead accuses the rebels of staging the assault to try to implicate the regime.
As a team of United Nations experts investigates in the country, here's a look at some of the chemical weapons that experts believe are in the Syrian government's arsenal:
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