The two-day programme will be structured around plenary and dialogue sessions, during which the delegates will review policies, exchange views on best practices and identify future action in the fields of sport, education and culture.

Rather than encouraging and welcoming entrepreneurs, America is turning them away in droves.

Amid discussions Tuesday of ways social media can be used to ensure a sustainable future for the planet, one Rio+Social conversation emphasized how technology is accelerating and improving humanitarian relief.

Saying that "in today's interdependent global economy, what is good for India is good for America, and vice versa," a senior US official has advocated greater state and city engagement between the two countries.

The U.S. government aims to watch social media sites more closely, deepening its involvement in online activities at the likely cost of civil liberties.

The use of nation-branding by middle power states has continually increased as other nations engaged in the policy experience some success and create a name for themselves in the international community. Nation-branding allows states to distinguish themselves from other nations or create a new image due to negative perceptions of individuals across the world.

Using the hashtag #AskState, participants from around the world can simultaneously submit questions and share ideas directly with Under Secretary Sonenshine about U.S. public diplomacy.

Still, in the unquantifiable world of soft power, hosting an Olympic games is a big deal. Some 100 presidents, princes and other national leaders will flit by London at some point during the games, along with up to 40,000 journalists.