BULLETIN – AT 8:50 A.M. ET:  A reminder of what's out there.  From Fox:

DEVELOPING: Authorities say they have a suspect in custody after finding a backpack which may contain ammonium nitrate near the Pentagon in Arlington, Va.

A source with knowledge of the investigation told Fox News that authorities were alerted to a suspicious vehicle in the area early Friday morning. A backpack containing what they believe is five pounds of ammonium nitrate was found outside the vehicle, the source said.

A notebook was also found at the scene and contained threatening words like "Al Qaeda" and "Taliban," Fox News has learned.

The man arrested is a naturalized U.S. citizen who came to the country from Ethiopia, a source told MyFoxDC.com.

COMMENT:  Five pounds of ammonium nitrate can do some damage and take some lives.  We, of course, have to be careful about reporting this, as facts are just becoming known.  But we get a scare in America every few months when some would-be killer, whether affiliated with a group or not, tries something.  We've been lucky so far.  But no nation is lucky a hundred percent of the time.

June 17, 2011