James L. Jones, a retired Marine commandant, brings extensive military and diplomatic experience to his new post as national security adviser for President Barack Obama.

A short summary of each of the G-20 member’s objectives for the April summit in London.

The G20 meetings in Toronto will be marked by competing agendas on global growth and financial regulations. This Backgrounder looks at the range of policy concerns.

Leaders attending the Group of 20 summit in Pittsburgh will seek to forge agreements to buoy a global economic recovery and repair financial imbalances that contributed to the recession.