Based on the information present in the given passage, you need to write a correct answer to the given question. A correct answer is one that correctly and completely answers the question. Do not write answers that address the question partially or incorrectly. The correct answer must be contained in the given paragraph.

Let me give you an example: Paragraph- Sent 1: Obama was born on August 4, 1961, at Kapiʻolani Maternity & Gynecological Hospital in Honolulu, Hawaii.
Sent 2: He is the only President to have been born in Hawaii.
Sent 3: He was born to a white mother and a black father.
Sent 4: His mother, Ann Dunham (1942-1995), was born in Wichita, Kansas, of mostly English descent, with some German, Irish, Scottish, Swiss, and Welsh ancestry. Question: How old was Obama's mother when he was born?
The answer to this example can be: 19.
Here is why: Obama was born in 1961. His mother was born in 1942 and 1961-1942=19. Therefore, any of the following responses are considred correct: '19' and 'almost twenty'.

OK. solve this:
Paragraph- Sent 1: Before 9/11, the CIA did not invest in developing a robust capability to conduct paramilitary operations with U.S. personnel.
Sent 2: It relied on proxies instead, organized by CIA operatives without the requisite military training.
Sent 3: The results were unsatisfactory.
Sent 4: Whether the price is measured in either money or people, the United States cannot afford to build two separate capabilities for carrying out secret military operations, secretly operating standoff missiles, and secretly training foreign military or paramilitary forces.
Sent 5: The United States should concentrate responsibility and necessary legal authorities in one entity.
Sent 6: The post-9/11 Afghanistan precedent of using joint CIA-military teams for covert and clandestine operations was a good one.
Sent 7: We believe this proposal to be consistent with it.
Sent 8: Each agency would concentrate on its comparative advantages in building capabilities for joint missions.
Sent 9: The operation itself would be planned in common.
Sent 10: The CIA has a reputation for agility in operations.
Sent 11: The military has a reputation for being methodical and cumbersome.
Sent 12: We do not know if these stereotypes match current reality; they may also be one more symptom of the civil-military misunderstandings we described in chapter 4.
Sent 13: It is a problem to be resolved in policy guidance and agency management, not in the creation of redundant, overlapping capabilities and authorities in such sensitive work.
Sent 14: The CIA's experts should be integrated into the military's training, exercises, and planning.
Sent 15: To quote a CIA official now serving in the field:"One fight, one team."Sent 16: Finally, to combat the secrecy and complexity we have described, the overall amounts of money being appropriated for national intelligence and to its component agencies should no longer be kept secret.
Sent 17: Congress should pass a separate appropriations act for intelligence, defending the broad allocation of how these tens of billions of dollars have been assigned among the varieties of intelligence work.
Sent 18: The specifics of the intelligence appropriation would remain classified, as they are today. 
Question: When did the United States concentrate responsibility and necessary legal authorities as a joint CIA-military team?.
Answer:
11.