Plane Crash

Question: Bill was a Pilot. He was going to retire. But before he retired he wanted to do one more flight over the Atlantic Ocean (Other people were on the plane). Bill crashed (To no surprise, he was 94) and every single person on the plane died. The next week Charlie Marcial was interviewed on a T.V. show. He was famous because he survived Bill's last plane crash. How is this possible?

Question: People see through me, but none pass through without killing me. I can be anywhere, and can be seen double or single. What am I?

Question: What can be broken but never forgotten?

Question: Which thing that comes once in a year, twice in a week?

Question: You are trying to get your chicken, fox, and wheat to the barn. However, the barn is on the other side of the river. You are on a boat and can only transport one animal or wheat at a time. You must choose carefully not to leave the wrong two together, though. It's either the fox will eat the chicken or the chicken will eat the wheat. How do you take each thing across safely?

Question: During what month do people sleep the least?