Janet Napolitano: “We are very concerned about the violence in Mexico. It is one of the things that we work on very closely with Mexico.”

We do not see that as a barrier to achieving equality.

I think one of the real significant improvements made by this bill is to bring people out of the shadows, we know who they are, we know where they are.

I think the whole aviation sector demonstrates the necessity to have a layered approach so that if someone or some group is able to evade one layer, another layer can pick them up.

As President Obama has said, the FBI is investigating this as an act of terrorism, and the full force of the Federal Government will support the response and the investigation.