A few weeks ago, I wrote about the situation of Roxana Saberi, a former colleague who had been arrested in Iran. Roxana, an American citizen whose father is Iranian, has reported from Tehran for the BBC, as well as US broadcasters.
Last week we learned she had been charged with espionage. This morning, we've reported that she has been put on trial in Tehran, accused of spying for the United States.
Roxana's situation is serious - last November Iran executed an Iranian businessman convicted of spying for Israel. Given the circumstances, it is not appropriate for us to comment further - however, Roxana's case is the source of much interest elsewhere, including a thoughtful and timely column in the Wall St Journal today.
Jon Williams is the BBC World News Editor.