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Publicly US officials have insisted that the war is going according to plan , and the most advanced US forces are currently some 100 kilometers ( 60 miles ) outside of Baghdad .
 US: attacker
Given event type and trigger, please tell me the arguments of all the listed option. Output format is "name1: role1; name2: role2". 
Event type: attack 
  Option: victim, attacker, place, target, instrument 
Text: {0} 
Answer:
 US: attacker