Through the America's Great Outdoors Initiative, my Administration has striven to meet those challenges and lay the foundation for a comprehensive, community-driven conservation strategy.

WHITEHOUSE: The White House

"I'm optimistic that we can find the right balance between security and economic opportunity that is necessary ... and we'll be striving hard to meet those challenges, " Card said.

CNN: Card: Bush wants to reopen Reagan National 'as quickly as we can'

Similarly, the Philly Rising program relies on a collaborative, community-based approach to empower residents to tackle crime and quality of life issues and coordinate city services to better meet those challenges.

WHITEHOUSE: Community Engagement and Civic Collaboration

And it is going to be up to you to meet all of those challenges -- to build industries and make discoveries and inspire the next generation.

WHITEHOUSE: President Obama Gives Commencement Address at Kalamazoo Central High School | The White House

As you heard him say today, he feels that this is an important opportunity for Italy to, again, meet those challenges.

WHITEHOUSE: Press Briefing

And those who believe government has a responsibility to meet these urgent challenges have a great stake in bringing our deficits under control -- because if we don't, we won't be able to meet our most basic obligations to one another.

WHITEHOUSE: Encouraging Long-Term Fiscal Responsibility and Reform

Those who worry today whether we have what it takes to meet the challenges of this new and difficult century need to look at the people who continue to join their fates to ours.

WSJ: America's New Tiger Immigrants: Asians in the U.S.

When brands such as these bring their full resources to bear on social change, and combine their efforts with those of government and philanthropies, these three pillars can meet the challenges we face with equal force.

FORBES: Why Business Must Become A Third Pillar of Social Change