question: (CNN) -- A year ago Thursday, I-Report was born.

CNN.com launched its I-Report initiative August 2, 2006, in an effort to involve citizens in the newsgathering process.

Numerous milestones later, I-Report has grown and developed its ability to be an integral component of the network's coverage.

Mark Lacroix photographed the collapsed bridge from his apartment window.

On the eve of its anniversary, I-Reporters responded to yet another major news event: the deadly collapse of a bridge over the Mississippi river in Minneapolis, Minnesota.

Mark Lacroix sent photos of the scene immediately after the disaster. As the story developed, he provided information about the situation to viewers live on television.

Lacroix's photos were among the more than 450 I-Report submissions sent to CNN within the first 24 hours of the bridge's collapse -- the biggest response in one day to a single news event in I-Report history.

CNN.com readers have long been submitting photos and video, as well as speaking with CNN reporters, during major breaking news events. (Check out our timeline of I-Report milestones) "

On April 16, Jamal Albarghouti sent cell phone video of the Virginia Tech shooting in Blacksburg, Virginia, as the dramatic events were unfolding.

More recently, when fireballs began exploding from an industrial gas facility in Dallas, Texas, in July, I-Reporters wasted no time in recording video as smoke and debris rose into the air.

Justin Randall was in a convertible during the incident and tried to drive around blast debris on a highway. He sent video of the explosions, showing flames rising high into the air.
1. What is I-Report meant for?
2. When was it created?
3. Was that a month ago?
4. How long ago was it?
5. Who took photo's?
6. Of what?
7. Did he view it from work?
8. Where from then?
9. Did he send them to anyone?
10. Whom?
11. Did he wait a long time to do that?
12. When did he send them?
13. Who created I-Report?
14. What happened in April?
15. Did anyone share information when that happened?
16. Who shared the information?
17. Where was there a large fire?
18. What happened?
19. When did this occur?
20. Did anyone capture footage?
****
answer: 1. involve citizens in the newsgathering process
2. August 2, 2006
3. No
4. A year ago
5. Mark Lacroix
6. the collapse of a bridge
7. No
8. From his apartment window
9. Yes
10. to CNN
11. No
12. immediately
13. CNN.com
14. the Virginia Tech shooting in Blacksburg, Virginia
15. Yes
16. Jamal Albarghouti
17. Dallas, Texas
18. fireballs began exploding from an industrial gas facility
19. in July
20. Yes

question: (CNN) -- Pro wrestling legend Hulk Hogan, embroiled in a bitter divorce with his wife, Linda, told Rolling Stone magazine he can "totally understand" O.J. Simpson, the former football great found liable for the deaths of his wife and another man.

Linda and Hulk Hogan enjoy happier times at the 2006 MTV Video Music Awards in New York in 2006.

"I could have turned everything into a crime scene like O.J., cutting everybody's throat," Hogan said in the interview for a feature that will run in Friday's edition of the magazine.

"You live half a mile from the 20,000-square-foot home you can't go to anymore, you're driving through downtown Clearwater [Florida] and see a 19-year-old boy driving your Escalade, and you know that a 19-year-old boy is sleeping in your bed, with your wife ...

"I totally understand O.J. I get it," Hogan said.

A spokeswoman for Rolling Stone magazine confirmed the quote to CNN. Watch report on Hogan's statements "

It has been widely reported that Linda Hogan, 49, is dating a younger man. She filed for divorce in 2007 after nearly 25 years of marriage.

Simpson was found not guilty of murder in the 1994 stabbing deaths of his wife, Nicole Brown Simpson, and her friend, Ron Goldman, but was found liable for their deaths by a civil court jury.

Simpson later was found guilty in a Las Vegas, Nevada, armed robbery case and sentenced in December to up to 33 years in prison.

A spokesman for Linda Hogan said Wednesday that the statement amounts to a death threat and that her attorney is "weighing all options necessary to protect his client."
1. Who is Hulk Hogan?
2. Who did he say in an interview that he could understand?
3. Who was he giving the interview to?
4. Did he say he could have turned his situation into a crime scene?
5. What is his situation?
6. How long was he married?
7. Who was his wife?
8. How old is she?
9. How old does Hulk think her new boyfriend is?
10. Did he seem him driving his vehicle through town?
11. How far does Hulk live from his former residence?
12. Did Linda Hogan's attorney take Hulk's words as a threat?
13. What did Hulk say he could have done to everybody?
14. Even though he compared that to OJ Simpson's case, was OJ convicted of murder?
15. When was his case?
16. What happened to his wife?
17. Her male friend, too?
18. Was he found liable for it in civil court, though?
19. What was he later convicted of?
20. How long was his sentence?
****
answer: 1. A pro wrestling legend
2. O.J. Simpson
3. Rolling Stone
4. Yes.
5. unknown
6. nearly 25 years
7. Linda Hogan
8. 49
9. 19
10. yes
11. half a mile
12. yes
13. cut everybody's throat
14. No
15. 1994
16. stabbed to death
17. yes
18. yes
19. armed robbery
20. up to 33 years

question: Manganese is a chemical element with symbol Mn and atomic number 25. It is not found as a free element in nature; it is often found in minerals in combination with iron. Manganese is a metal with important industrial metal alloy uses, particularly in stainless steels.

Historically, manganese is named for pyrolusite and other black minerals from the region of Magnesia in Greece, which also gave its name to magnesium and the iron ore magnetite. By the mid-18th century, Swedish chemist Carl Wilhelm Scheele had used pyrolusite to produce chlorine. Scheele and others were aware that pyrolusite (now known to be manganese dioxide) contained a new element, but they were unable to isolate it. Johan Gottlieb Gahn was the first to isolate an impure sample of manganese metal in 1774, which he did by reducing the dioxide with carbon.

Manganese phosphating is used for rust and corrosion prevention on steel. Ionized manganese is used industrially as pigments of various colors, which depend on the oxidation state of the ions. The permanganates of alkali and alkaline earth metals are powerful oxidizers. Manganese dioxide is used as the cathode (electron acceptor) material in zinc-carbon and alkaline batteries.

In biology, manganese(II) ions function as cofactors for a large variety of enzymes with many functions. Manganese enzymes are particularly essential in detoxification of superoxide free radicals in organisms that must deal with elemental oxygen. Manganese also functions in the oxygen-evolving complex of photosynthetic plants. While the element is a required trace mineral for all known living organisms, it also acts as a neurotoxin in larger amounts. Especially through inhalation, it can cause manganism, a condition in mammals leading to neurological damage that is sometimes irreversible.
1. What is the article about?
2. What is it used for?
3. How about in natural science?
****
answer:
1. Manganese element
2. rust and corrosion prevention on steel
3. stainless steels.