If we embraced the value and human principle and invoked that, we could resurrect ourselves from the ground up.

FORBES: USA: The United States Of Design?

In the United States, we will never forget how Australia invoked the ANZUS Treaty -- for the first time ever -- showing that our two nations stood as one.

WHITEHOUSE: President Obama Speaks to the Australian Parliament

Many people have invoked the famous drawings of Henry Moore of people sleeping on the platform, and now instead, we had body bags on the platforms, but it was quite extraordinary the level of calm on the street, thousands of people standing around in very subdued mood.

NPR: Novelist Ian McEwan: Attacks Resulted in Solidarity