Mr Ibarretxe wants to hold a referendum on the right of Basques to self-determination.

ECONOMIST: How much is enough?

California's 2008 Proposition 8 referendum revoked the right of same-sex couples to wed after lawmakers and the state courts previously allowed it.

CNN: STORY HIGHLIGHTS

Hailed as a landmark accord, Montenegro has nonetheless reserved the right to take the issue of independence to a referendum after three years.

BBC: Yugoslavia opts to end federation