822
It said the U . S . invasion of Iraq taught it that `` a war can be averted and the sovereignty of the country and the security of the nation can be protected only when a country has ... a strong military deterrent force capable of decisively repelling any attack to be made by any types of sophisticated weapons .''
 ( attack: invasion,  U . S: attacker, Iraq: place) 
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: invasion,  U . S: attacker, Iraq: place) 