Here are the stories we’re covering today:
In international news:
• US and South Korean united front. Don Kirk on the first-ever meeting Tuesday between President Obama and South Korean President Lee Myung Bak. They put up a united front against an increasingly belligerent North Korea, in contrast to their predecessors.
• Protectionist move. Peter Ford on a new Chinese government edict requiring that economic stimulus money be spent only on Chinese goods, taking the world a step further towards a dangerous international trade war.
• Roots of Iran's conflict. Scott Peterson on how the current power struggle goes back three decades. Supreme Leader Khamenei faces an unprecedented challenge from the old guard of the revolution - Rafsanjani, Mousavi, etc.