20/20 -- ABC - Friday, September 9 - 10:00 p.m. (EDT)

Four years later, the events of September 11, 2001, are still fresh enough in our minds that we are inevitably going to face an onslaught of retrospective looks each year near that horrible anniversary. Tonight alone, A&E has Portrait of a Terrorist: Mohamed Atta at 9:00 and Biography features a look at Al Qaeda at 10.

For its part, ABC (with reporter Brian Ross) is doing a full week of stories on the threat of nuclear terrorism, culminating in this special 20/20 edition that also looks at what the government is doing to prevent such strikes, and ways that we can protect ourselves in case it happens anyway. In view of still another "surely it wouldn't happen here" in New Orleans just last week, maybe we ought to check this one out, just in case.

Your comments or questions are welcome!