Troopers never enforce it however. A broken white line on a two lane highway means it's OK to pass slow moving cars on the left if the coast is clear in-front of you. Source(s): Alignment, suspension and brake shop. In Europe, it means you may overtake, but with caution. A soild line means to not cross over.
Best Answer: There have been 6 manned Moon missions, between 1969 and 1972. I'm assuming you mean manned trips to the Moon. All of those were conducted by the US, from 1968 through 1972; 9 missions in all. Apollo 8 was the first time man visited the Moon, in December 1968 right at Christmas time. It was famous for the reading from Genesis on Christmas Day.
The decision to land a man on the Moon changed the goals and schedule of the Ranger effort. The science program now had a dual purpose: to scout for landing sites for Apollo astronauts and to gather new information about the Moon. The Ranger spacecraft gave Americans their first look at the Moon from close range. Nine Rangers were launched from 1961 through 1965. The first six failed. The spacecraft was redesigned and Rangers 7, 8, and 9 successfully transmitted more than 17,000 television pictures of the lunar surface.