TAPACHULA, Mexico – The migrant caravan headed here to the US is starting to weaken as some tired, hungry, and sick travelers are deciding to return home. But roughly 5,000 people are pressing on. Some are asking questions about who is in the caravan, so CBN News asked our contributing correspondent Chuck Holton to check it out. He caught up with the caravan in the Mexican city of Tapachula. "I want to try and clarify some of what you've been hearing in the news media about this caravan moving north into the United States. First of all, the people in...