reuters.com/ Millions of Shia flock to Iraqi holy town as government fears Islamic State attack December 11, 2014 | 10:48 PM0 SHAFAQNA – Millions of pilgrims trek on foot to Kerbala for a Shi’ite ceremony, but security is tight amid fears that Sunni Islamic State fighters will “infiltrate” crowds and launch an attack. Mana Rabiee reports.