Egyptian riot police are firing tear gas canisters bearing the label "Made in U.S.A" against street demonstrations in Cairo, according to protesters who provided ABC News with pictures of the canisters. The protestors said the tear gas canisters were recovered in Tahrir Square...The label urges anyone who comes in contact with the gas "to seek assistance as soon as possible." According to the canister labels, the tear gas is produced by Combined Systems International of Jamestown, Pennsylvania. The company's web-site says it sells "non-lethal weapons" to foreign governments...A company spokesperson did not return calls by ABC News seeking comment..."The way I see it the U.S. administration supports dictators," said Aly Eltayeb, 26, who has participated in the protests...