The president of Yemen, Ali Abdullah Saleh, has warned that any attempt at a military coup will lead to civil war.
He said he would step down by January next year, but only after organising parliamentary elections.
His offer was rejected by the Yemeni opposition, which wants him to leave immediately.
President Saleh faces a threat from a growing protest movement which in the past few days has been joined by generals, ambassadors, tribal leaders and other senior officials.
Gregory Johnsen is an expert on Yemen at Princeton University.
First broadcast 22 March 2011
This page is best viewed in an up-to-date web browser with style sheets (CSS) enabled. While you will be able to view the content of this page in your current browser, you will not be able to get the full visual experience. Please consider upgrading your browser software or enabling style sheets (CSS) if you are able to do so.