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bombardment of baghdad continues tonight and over the past 20 minutes , explosions rocking baghdad , central baghdad southern baghdad , the outskirts of baghdad , and importantly , as the coalition forces , principally u . s . army forces , move against saddam hussein international airport -- which is about ten miles outside the center of baghdad -- those explosions are intensifies .
 ( attack: bombardment,  forces: attacker, u . s . army: attacker, forces: attacker, baghdad: place, baghdad: target, baghdad: target, outskirts: target, saddam hussein international airport: target) 
Locate the role in the text that participated in the event based on the event type and return it in the event list. 
 Option: Event type: declare bankruptcy, transfer ownership, transfer money, marry, transport, die, phone write, arrest jail, convict, sentence, sue, end organization, start organization, end position, start position, meet, elect, attack, injure, born, fine, release parole, charge indict, extradite, trial hearing, demonstrate, divorce, nominate, appeal, pardon, execute, acquit, merge organization, Arguments type: beneficiary, prosecutor, plaintiff, seller, victim, buyer, agent, destination, artifact, organization, recipient, person, place, origin, target, giver, adjudicator, attacker, vehicle, defendant, entity, instrument. 
Text: {0} 
Answer:
 ( attack: bombardment,  forces: attacker, u . s . army: attacker, forces: attacker, baghdad: place, baghdad: target, baghdad: target, outskirts: target, saddam hussein international airport: target) 