"As is often the case, we are navigating by the stars under cloudy skies. In such circumstances, risk-management considerations are critical."

Everyone's heard Martin Luther King's "I Have a Dream" speech dozens of times. A biographer renders how it struck the ear of one young woman who traveled to the March on Washington, from the South Side of Chicago.

"Our sense of self is now inextricably tied to a huge global entourage of prying commentators who live in those phones of ours that are always in our pockets."

"When our partnership progresses, economic resilience increases, innovation grows, science flourishes, knowledge advances, humanity benefits, our seas and skies are safer, democracy will shine brighter, and the world will be a better place."

How will you exercise your power; your responsibility?