The engineer who was involved in Sunday's New York train derailment apparently "was nodding off and caught himself too late" before the accident that killed four people and injured 67 others, a union representative who has been meeting with the man told CNN on Tuesday. 

Anthony Bottalico, the union representative, said engineer William Rockefeller Jr. recognizes his responsibility in the incident. 

"I think most people are leaning towards human error," Bottalico said. 

Rockefeller's lawyer, Jeffrey Chartier, characterized what happened as "highway hypnosis." He said his client had had a full night's sleep before the crash, and that Rockefeller had no disciplinary record. 

In a brief conversation with investigators, Rockefeller said that moments before the derailment of the Hudson Line train in the Bronx he was "going along and I'm in a daze. I don't know what happened," according to a law enforcement official familiar with that conversation. 

Asked by investigators what he was thinking when he said he was dazed, the engineer said he couldn't say. Rockefeller spoke to Metropolitan Transportation Authority and New York Police detectives at the crash site before he was taken to the hospital Sunday. 

National Transportation Safety Board member Earl Weener told a news conference that Rockefeller would have had a chance to get the necessary sleep prior to his 5 a.m. shift the day of Sunday's accident, echoing comment from Rockefeller's lawyer. 

According to NTSB representatives, results from alcohol breath tests for the train engineer were negative, and both the brake and signal systems in the deadly Metro-North accident appeared to be working. Other toxicology results have not yet come back.  What are the answers to this following set of questions: 1. When was the accident?
2. where?
3. What kind of vehicle was it?
4. how did it happen?
5. who?
6. was anyone killed?
7. was anyone injured? yes or no only
8. was it human error?
9. Who was Rockefeller's attorney?
10. What does he say about it?
11. Did the engineer answer as to what he was thinking at the time?
12. was there a news conference?
13. What was said?
14. Did the lawyer agree?
15. was there an alcohol test?
16. what was the result?
17. what was said about the break systems?
18. what about signal systems?
19. when did rockefeller talk to the police?
20. where?
Answer: 1. Sunday
2. New York
3. train
4. was nodding off and caught himself too late
5. engineer
6. killed four people
7. injured 67 others
8. most people are leaning towards human error
9. Jeffrey Chartier
10. He said his client had had a full night's sleep before the crash, and that Rockefeller had no disciplinary record
11. going along and I'm in a daze. I don't know what happened
12. Yes
13. Rockefeller would have had a chance to get the necessary sleep prior to his 5 a.m. shift the day of Sunday's accident,
14. Yes
15. Yes
16. negative
17. appeared to be working
18. appeared to be working
19. day of the crash
20. at the crash site

(CNN) -- Marissa Mayer, who was Google's first female engineer and its 20th employee when she joined that company in 1999, has been named CEO of Yahoo. 

She's the fifth CEO in as many years at that struggling company. Monday's announcement has caused ripples in the world of technology as people expressed surprise that Mayer would leave Google and that Yahoo has landed such a charismatic leader. 

Here's a quick guide to some of the most interesting and water-cooler-worthy facts about the 37-year-old. (We know what you're thinking. And yes -- an 11-point list can successfully illuminate decades of a person's personal and professional life. Of course it can.) 

If we missed something fun, let us know in the comments. 

1. She's responsible for the clean look of Google.com. The minimalist home page, with plenty of white space and a single search bar in the center, is said to be the brainchild of Mayer, who has overseen the launch and development of many of Google's iconic products. 

"Google has the functionality of a really complicated Swiss Army knife, but the home page is our way of approaching it closed. It's simple, it's elegant, you can slip it in your pocket, but it's got the great doodad when you need it," she told Fast Company in 2005. "A lot of our competitors are like a Swiss Army knife open -- and that can be intimidating and occasionally harmful." 

2. She specializes in artificial intelligence. Mayer holds bachelor's and master's degrees from Stanford University. For both degrees, Mayer focused on artificial intelligence, which has become a core area of focus for Google, a company that has introduced autonomous cars and whose computers are trying to use equations to understand human speech. She told CNN she holds several patents in AI and interface design.  What are the answers to this following set of questions: 1. What company just got a new CEO?
2. What is that person's name?
3. Where did she work previously?
4. Was their anything special about her and that comany?
5. What does she specialize in?
6. What well-known thing is she responsible for?
7. How many points did the full article make about her?
8. Who did she speak to in 2005?
9. What common item did she reference in that talk?
10. Did she go to college?
11. Where did she go?
12. Did she get an undergraduate and post-grad certificate?
13. What did she tell CNN?
14. In what?
15. Are people surprised that she left her old job?
16. What kind of leader do people think of her as?
17. Is there any sarcasm in this article?
18. Can you give me an example of it?
19. What is a core ideal at Google?
Answer: 1. Yahoo
2. Marissa Mayer
3. Google
4. First female engineer
5. Artificial intelligence
6. Tthe clean look of Google.com.
7. 11
8. Fast Company
9. Swiss Army Knife
10. Yes
11. Stanford University.
12. Yes
13. She holds several patents.
14. AI and interface design.
15. Yes
16. Charismatic.
17. Yes.
18. "Of course it can."
19. Artificial intelligence

(CNN) -- Double amputee sprinter Oscar Pistorius has moved a step closer to realizing his dream of participating in the Olympics after running the 'B' standard qualifying time for next year's Games in London. 

The 24-year-old, who was born without fibulae in both legs, clocked 45.61 seconds to win the 400m race at the Provincial Championships in his home town of Pretoria in South Africa on Wednesday. 

Dubbed the 'Blade Runner' because of his carbon fiber prosthetic limbs, Pistorius must now run 0.6 seconds faster to be granted automatic qualification. But his time could still be good enough to earn him a place in the South African team depending on the performance of other athletes. 

After narrowly missing out on the time required for the Beijing Olympics, the Johannesburg-born athlete expressed his delight at the achievement on his Twitter page. 

"One of the best nights of my life. Ran a 45.61sec 400m Olympic qualifying time and fastest time in South Africa," Pistorius, whose legs were amputated when he was just 11 months old, wrote. 

"Thanks to everyone who has supported and believed in me in my Quest to 2012 London Olympics. One step closer. I'm hungry for it." 

After finishing sixth at his National Championships in 2007, Pistorius was blocked from competing alongside his able-bodied counterparts as his blades were considered to give him an unfair advantage. 

But in 2008 the Court of Arbitration for Sport ruled in favor of the four-time Paralympic champion after a lengthy legal battle with the IAAF.  What are the answers to this following set of questions: 1. How did he qualify for the Olympics?
2. What handicap does he have?
3. What sport does he participate in?
4. How old is he?
5. Where is his hometown?
6. What is his nickname?
7. And why is that?
8. What was his time in the qualifying race?
9. And was he happy with that time?
10. How old was he when he lost his legs?
11. What caused him to lose his legs?
12. Why was he stopped from competing?
13. Was that decision overturned?
14. By whom?
15. What is his ultimate goal?
Answer:
1. running the 'B' standard qualifying time
2. Double amputee
3. 400m race
4. 24
5. Pretoria in South Africa
6. Blade Runner
7. because of his carbon fiber prosthetic limbs
8. 45.61 seconds
9. yes
10. 11 months old
11. was born without fibulae in both legs
12. his blades were considered an unfair advantage.
13. yes
14. Court of Arbitration for Sport
15. 2012 London Olympics