Q: In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Try to find the best answer that is most likely to fill in "_". Note that the URLs in the text have been replaced with [Link].
(CNN) -- NATO agreed Thursday to take command of enforcing a no-fly zone over Libya and was considering taking control of the full U.N.-backed military mission, Secretary-General Anders Fogh Rasmussen told CNN. Rasmussen's announcement fell short of what U.S. President Barack Obama has sought, and it was unclear if concerns by Turkey and some other NATO allies over coalition airstrikes on Libyan ground forces would prevent NATO from agreeing to expand its command over the entire mission. "What we have decided today is that NATO will enforce the no-fly zone," Rasmussen said in an interview with CNN's Wolf Blitzer. "We are considering whether NATO should take on overall responsibility. That decision has not been made yet."NEW: U.S. official says NATO agrees take on broader command, but details pendingThe deal means NATO will assume command of one part of the military missionNATO is still considering whether to also take command of the rest of the missionThe agreement followed talks involving Britain, France, Turkey and the United States 
 Question:When _ finally emerged to announce an agreement, it was clear that questions over the rules of engagement remained unresolved.
A:
Anders Fogh Rasmussen