1165
Procedural improvements such as specific flight crew training , altering air traffic procedures to minimize exposure to the threat , and improved security near airports may be less costly than countermeasures and could more immediately help deter domestic terrorist attacks .
 attack: attacks
Please tell me event type and its trigger word from given type options. Output format is "type: trigger".  Option: declare bankruptcy, transfer ownership, marry, die, phone write, arrest jail, convict, sue, transfer money, end organization, start organization, end position, merge organization, start position, transport, charge indict, elect, attack, injure, born, extradite, release parole, sentence, demonstrate, meet, trial hearing, divorce, nominate, fine, appeal, pardon, execute, acquit 
Text: {0} 
Answer:
 attack: attacks