The United Nations is preparing to send a team to Syria to investigate whether chemical weapons were used in a deadly March rocket attack near Aleppo.
UN to Investigate Chemical Weapons in Syria

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Animal carcasses lie on the ground, killed by what residents said was a chemical weapon attack days earlier,Khan al-Assal Syria, March 23, 2013.

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A general view shows Khan al-Assal near where residents say a March 19 chemical weapon attack occurred.

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Residents and medics transport a Syrian Army soldier, wounded in what they said was a chemical weapon attack near Aleppo, to a hospital, March 19, 2013.

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People breathe through oxygen masks as they are treated at a hospital in Aleppo, March 19, 2013.