Here is what we're covering today:
• Iran's Twitter factor. A roundup of coverage of how Iranians used Twitter to spread messages while cellphone transmission was down.
On the Air France crash:
• Air France update. A brief roundup of the latest developments.
• The flight controller factor. Alex Marks explores whether a computer problem experienced by a flight controller contributed to the Air France disaster.
In US news:
• Arts report card. Stacy Teicher Khadaroo reports on a national snapshot of eighth-graders' participation and achievement in music and visual arts – the first look since 1997.
• Selling US bonds. Mark Trumbull reports on the drop last month in foreign investment in US bonds. Is it a sign that governments abroad are worried about US debt levels?
• Hate-crime law. Patrik Jonsson looks at what the recent shootings mean for the success of the hate-crimes legislation, which would expand the powers of the FBI to prosecute certain kinds of crimes in local jurisdictions.
In world news:
• North Sea carbon dump. Valeria Criscione reports on a Norwegian plan to hold all of Europe's carbon dioxide in the North Sea basin. Norway recently invested nearly $200 million in a project to prove it can be done.
• Glimpse of elite Cuba. Castro’s son, duped into an Internet "affair" by a Miami exile, reveals how the Cuban nomenklatura live.
• Netanyahu's terms. Josh Mitnick on the hardline Israeli leader's key condition for a Palestinian state: Recognition of Israel as a Jewish state. Is this the core of the Arab-Israeli conflict or just an artificial demand designed to impede progress?