By Tom Infield
The Philadelphia Inquirer
On Aug. 9, 2005, four Pennsylvania National Guard soldiers from the Philadelphia region were killed when an improvised bomb exploded on a dirt road near Beiji, Iraq.
Now, thanks to an FBI sting operation and the discovery of latent fingerprints on a six-year-old unexploded bomb, veterans of the stricken Guard unit hope that the Justice Department might have a lead on who set the blast.
FBI sting may lead to killer of Pa. Guard members