By JASON HOROWITZ A high-speed passenger train rear-ended another in Spain on Wednesday morning near the central city of Toledo, killing at least 68 people and injuring dozens more, officials said, in one of the deadliest train crashes in Spanish history. The cause of the crash, which sent parts of both trains down a rural embankment, was not immediately clear. It was the second lethal crash this year involving the same two rail operators, and it was likely to deepen doubts about the security…
