The U.N. Security Council unanimously passes a resolution aimed at “a world without nuclear weapons,” in the words of President Obama, who chaired the special session. The resolution is intended to reduce the chances of civilian nuclear programs being used for military purposes, and to ensure full compliance with existing arms agreements, particularly from countries such as Iran and North Korea.

Secretary of State Hillary Clinton says that the U.S. will engage with Burma’s military government, while also maintaining sanctions imposed on account of the junta’s human rights abuses. Burma’s pro-democracy opposition leader Aung San Suu Kyi expresses her support for the new U.S. policy.

Heads of state from the Group of 20 gather in Pittsburgh tonight. Three main issues are on the table: “rebalancing” the world economy, meaning that debtors like the U.S. should save more, while exporters like China should consume more; tightening financial regulation around the world; and allowing poorer countries more representation at the International Monetary Fund.

The largest-ever discovery of Anglo-Saxon treasures is uncovered by an amateur in a field in Staffordshire, England. The collection of nearly 1,500 gold and silver pieces will “alter our perception of Anglo-Saxon England,” says Leslie Webster, former curator of Anglo-Saxon archaeology at the British Museum.