As the governing body of association football, FIFA is responsible for maintaining and implementing the rules that determine whether an association football player is eligible to represent a particular country in officially recognised international competitions and friendly matches. In the 20th century, FIFA allowed a player to represent any national team, as long as the player held citizenship of that country. In 2004, in reaction to the growing trend towards naturalisation of foreign players in some countries, FIFA implemented a significant new ruling that requires a player to demonstrate a "clear connection" to any country they wish to represent. FIFA has used its authority to overturn results of competitive international matches that feature ineligible players.

FIFA's eligibility rules also demand that in men's competitions, only men are eligible to play, and that in women's competitions, only women are eligible to play.

Historically, it was possible for players to play for different national teams. For example, Alfredo di Stefano played for Argentina (1947) and Spain (195761).

Di Stefano's Real Madrid teammate Ferenc Puskas also played for Spain after amassing 85 caps for Hungary earlier in his career. A third high-profile instance of a player switching international football nationalities is Jose Altafini, who played for Brazil in the 1958 FIFA World Cup and for Italy in the subsequent 1962 FIFA World Cup. What are the answers to this following set of questions: 1. What is FIFA
2. of what?
3. What do Americans call this sport?
4. What is one thing they do?
5. for what?
6. How did they decide if a person could play for a national team before?
7. When did this change?
8. Why?
9. How do they decide now?
10. What do they do if a match has someone that should not be playing?
11. Has anyone ever played for more than one national team?
12. Who was one such person?
13. Who did he play for?
14. What else does FIFA say about men's competitions?
15. What professional team does Puskas play for?
16. And he has played for what countries?
17. Did Altafine play in more than one World Cup?
18. when?
19. What countries?
20. How often is the World CUp?
Answer: 1. governing body
2. association football
3. soccer
4. maintaining and implementing the rules
5. eligibility
6. citizenship
7. In 2004
8. in reaction to the growing trend
9. clear connection
10. overturn results
11. yes
12. Alfredo di Stefano
13. Argentina and Spain
14. only men are eligible
15. Real Madrid
16. Spain and Hungary
17. yes
18. 1958 and 1962
19. Brazil and Italy
20. unknown

(CNN) -- Many have claimed to know the identity of the notorious Zodiac Killer, who terrorized northern California with a trail of unresolved murders in the 1960s. But their stories have not panned out.

Now, a Louisiana man believes he has the definitive answer to the chilling mystery: Who was the crazed, elusive killer who wrote letters bragging about his conquests?

Gary Stewart says it was Earl Van Best, Jr., his biological father, who died in 1984.

"I believe for the first time in the history of this case that I have presented more evidence that has ever been presented on any one suspect," Stewart told CNN's Erin Burnett about his new book.

The Zodiac Killer has been connected to five deaths between 1968-69. Though he was never caught, he gained notoriety by writing several letters to police and newspapers boasting of the slayings. He included swatches of bloody clothing as proof of his claims of killing as many as 37 people.

Stewart's quest for dad

Stewart was born in New Orleans, abandoned as a newborn in a stairwell in Baton Rouge, and later adopted.

About 10 years ago, when he was 39, his birth mother, Judy, contacted him for the first time. He then began his search for his biological father, whom both had not contacted since Stewart was abandoned.

The vice president of a cleaning company in the capital of Louisiana recounted his decade-long search for his biological father, which ended with the discovery that Best was the serial killer. What are the answers to this following set of questions: 1. Who tried to find information about his father?
2. Who was his father?
3. Who was his mom?
4. How old was he was she got in touch with him?
5. Why hadn't he had any contact with them?
6. What was Stewart's job?
7. Where did he work?
8. Where was he born?
9. Who was a famous murderer in California?
10. Which part of California?
11. How many people did he definitely kill?
12. Was he captured?
13. Do people think they know who he is?
14. Have any of them been proven right?
15. Did the murderer write letters?
16. To who?
17. What did he include?
18. Who does Stewart think the murderer is?
19. Does he have proof?
20. Who did he talk to about his theory?
Answer: 1. Gary Stewart
2. Earl Van Best, Jr
3. Judy
4. 39
5. He was abandoned as a newborn.
6. He was vice president of a cleaning company.
7. In the capital of Louisiana.
8. In Baton Rouge.
9. The Zodiac Killer.
10. Northern California.
11. 37
12. No
13. Yes
14. No.
15. Yes.
16. To the police.
17. Swatches of bloody clothing.
18. Earl Van Best, Jr.
19. unknown
20. Erin Burnett

CHAPTER XVII. THREE DAYS

Lincoln awaited Graham in an apartment beneath the flying stages. He seemed curious to learn all that had happened, pleased to hear of the extraordinary delight and interest which Graham took in flying Graham was in a mood of enthusiasm. "I must learn to fly," he cried. "I must master that. I pity all poor souls who have died without this opportunity. The sweet swift air! It is the most wonderful experience in the world."

"You will find our new times full of wonderful experiences," said Lincoln. "I do not know what you will care to do now. We have music that may seem novel."

"For the present," said Graham, "flying holds me. Let me learn more of that. Your aeronaut was saying there is some trades union objection to one's learning."

"There is, I believe," said Lincoln. "But for you--! If you would' like to occupy yourself with that, we can make you a sworn aeronaut tomorrow."

Graham expressed his wishes vividly and talked of his sensations for a while. "And as for affairs," he asked abruptly. "How are things going on?"

Lincoln waved affairs aside. "Ostrog will tell you that tomorrow," he said. "Everything is settling down. The Revolution accomplishes itself all over the world. Friction is inevitable here and there, of course; but your rule is assured. You may rest secure with things in Ostrog's hands."

"Would it be possible for me to be made a sworn aeronaut, as you call it, forthwith--before I sleep?" said Graham, pacing. "Then I could be at it the very first thing tomorrow again. What are the answers to this following set of questions: 1. Where was Lincoln?
2. where?
3. who was he waiting for?
4. what mood was Grahm in?
5. what did he want to do?
6. Did he want to be an amatuer?
7. what was novel?
8. How did he feel about others that did not experience this?
9. how did he feel about it?
10. what held Grahm?
11. What could happen tomorrow?
12. who said that?
13. How were affairs?
14. will he learn about them?
15. by who?
16. what is inevitable?
17. where?
18. Can he be sound?
19. how?
20. What did Grahm want?
Answer:
1. an apartment
2. beneath the flying stages
3. Graham
4. enthusiasm
5. to fly
6. no
7. music
8. pity
9. the most wonderful experience in the world."
10. flying
11. make him a sworn aeronaut
12. Lincoln
13. Lincoln waved affairs aside.
14. yes
15. Ostrog
16. Friction
17. here and there
18. yes
19. in Ostrog's hands."
20. to be an aeronaut