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After Oregonian editorial page editor Bob Caldwell died Saturday, the report from the newspaper on Sunday said he had suffered a heart attack.

That does appear to be the 63-year-old journalist's cause of death. But the circumstances surrounding his last moments were considerably more complicated.

Men who eat a lot of fatty foods have lower quality sperm than men who avoid them, a new study found.

Saturated fat, the stuff in meat and dairy foods, was associated with lower sperm counts. The men eating the most saturated fat had 35 percent fewer sperm than men eating the least.

On the bright side, the men who ate more omega-3 fats — the kind found in fish and some plants — had slightly more sperm that were correctly formed than their brethren who ate less.

Iran said Tuesday that it was unwilling to allow international nuclear inspectors to have complete access to a restricted military complex, called Parchin, which is near the capital Tehran. There are concerns that the complex may contain a facility designed to test explosives meant to trigger a nuclear chain reaction.

Rick Santorum won two Southern state GOP presidential primaries Tuesday, embarassing Mitt Romney who had predicted he'd take one.

Second-place finisher Newt Gingrich vowed to fight on to Tampa, tag teaming Romney along with Santorum. The "three-way dynamic," as he put it, is a winner for Gingrich and, perhaps, his dream of deal-making at the convention, and for Romney, too, whose Southern result could have been much worse if he'd been posting up against Santorum alone.

Good morning.

Our early headlines:

-- 'Tragic Day For All Of Belgium': 22 Children Killed In Bus Crash.

-- In Afghanistan, Panetta Says Mission Continues.

Repair crews are working this morning to restore power to thousands of homes and businesses in Boston's Back Bay district, "after two transformers caught fire Tuesday night, knocking out power" and sending think black smoke billowing over the area, our colleagues at WBUR report.

Judges at a war crimes tribunal convicted Congolese warlord Thomas Lubanga of snatching children from the street and turning them into killers. A sentencing hearing will now be scheduled. Lubanga faces a maximum sentence of life imprisonment.

There's been a horrible traffic accident inside a Swiss tunnel. At least 28 people — 22 of them children mostly around the age of 12 — were killed Tuesday night when the bus they were in crashed.