Please pray for peace between North and South Korea after the North launched more than 200 artillery shells at a South Korean island, killing two South Korean marines and raising fears of a full blown war. Such a war on the Korean peninsula could be horrific, and could turn nuclear. Latest headlines from Asia:

• North, South Korea exchange artillery fire — 2 South Korean marines killed
• N Korea Warns Of More Attacks After Clashes
• North vows “merciless attacks”
• S. Korea denies seeking redeployment of U.S. tactical nuclear weapons
• North Korea Nuclear Find Raises Fear on Tehran: Pyongyang’s Apparent Use of Next-Generation Centrifuges Spurs Lawmakers’ Concerns That Technology Could Be Shared
• North Korea site stirs fears of nuclear arms: Pentagon points to danger it may speed up bomb making
• Russia sees “colossal danger”

Meanwhile, intriguing developments in Iran. The parliament is moving to impeach President Ahmadinejad, but has been stopped — at least temporarily — by Supreme Leader Ayatollah Khamenei. At the same time, there is new evidence that Iran’s nuclear program has been slowed further by computer viruses and possible other sabotage efforts. Latest headlines from Iran:

• WSJ: Iran’s parliament wants to impeach Ahmadinejad
• Washington Post: Iran’s nuclear program reportedly struggling — “Iran’s nuclear program has experienced serious problems, including unexplained fluctuations in the performance of the thousands of centrifuges enriching uranium, leading to a rare but temporary shutdown, international inspectors are expected to reveal Tuesday.”
• Ahmadinejad calls on Iranian girls to marry at 16
• Sanctions on Iran may be causing rift, Gates says