NEW YORK Dennis O'Brien, a military reporter with The Virginian-Pilot and a former Iraq war embed who died over the weekend, apparently committed suicide, according to sources in and outside the paper -- sparking speculation that his war experience might have contributed to his death. The Virginian-Pilot reported Sunday that O'Brien, 35, had died Saturday, without revealing a cause. [snip]...Several sources, however, said the reporter had taken his life, and suggested his time in Iraq may have played a role. "I think it was a contributing factor," said one colleague, who requested anonymity. "He saw some awful things while he...