Developments in the Yemen bomb investigation: Authorities there arrested a woman thought to be involved in the plot to send bombs to the US via cargo planes, the AP reports. Her role isn't clear, but she and others apparently used fake IDs to ship the devices, and a larger manhunt continues. Investigators also suspect that at least two language schools in the country are involved, reports the Wall Street Journal.
If that rings a bell, it's because the would-be Christmas Day bomber also attended a language school in Yemen thought to be affiliated with al-Qaeda. Both devices found yesterday had the explosive known as PETN—also used in the Christmas Day case—but yesterday's bombs had about fives times as much. Because of concern that more bombs may be en route, the US Postal Service has temporarily stopped accepting inbound mail from Yemen. (Read more terror threat stories.)