An American military attack on Syria could begin as early as Thursday and will involve three days of missile strikes, according to "senior U.S. officials" talking to NBC News. The Washington Post has the bombing at "no more than two days," though long-range bombers could "possibly" join the missiles. "Factors weighing into the timing of any action include a desire to get it done before the president leaves for Russia next week," reports CNN, citing a "senior administration official."

The...