Last year, President Barack Obama and former President George W. Bush attended New York's tenth anniversary observance of September 11. Today, things were much different. In Washington today, President Obama appeared at the Pentagon, 11 years after America's military headquarters was struck by a hijacked jetliner. In New York, there were no elected officials at today's observance. It was a simpler ceremony than those of the last decade in memory of the 2,977 people who were lost that day. Ted Mann is transportation reporter for the Wall Street Journal.