Open this photo in gallery:An aerial view of Manchester, U.K., on July 28. Two Iranian nationals face terror charges in an alleged plot targeting some of the city's Jewish sites.Christopher Furlong/Getty ImagesTwo Iranian nationals appeared in a London court on Saturday charged with plotting acts of terrorism involving the use of a homemade bomb to attack the Jewish community in northern England at the behest of a figure believed to be based in Iran. Rahman Salehi, 34, and Salam Ahmadyan, 36, were arrested on Sept. 20 at the start of Yom Kippur, the holiest day in the Jewish calendar, when...