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• FORT HOOD, Texas (AP) -- Despite evidence that suggests Spc. Ivan Lopez had an argument before going on a shooting rampage, investigators said they may never determine what compelled the Fort Hood soldier to kill three soldiers and wound 16 others before taking his own life.
• Lt. Gen. Mark Milley, Fort Hood's commander, said that an "escalating argument" precipitated the assault. He declined to discuss the cause of the argument but said investigators believe Lopez made no effort to target specific soldiers -- even though at least one of the soldiers shot was involved in the dispute.
• Milley would not say whether those involved were among the dead or wounded, or how many shooting victims had been a part of the argument.
• "There was no premeditated targeting of an individual," he said.
• However, the military has not established a "concrete motive" for Spc. Ivan Lopez's rampage, said Chris Grey, a spokesman for the Army's Criminal Investigation Command based in Quantico, Va.
• ___

• PERTH, Australia (AP) -- Search teams racing against time to find the flight recorders from the missing Malaysia Airlines jet crisscrossed another patch of the Indian Ocean on Saturday, four weeks to the day after the airliner vanished.
• A multinational team is desperately trying to find debris floating in the water or faint sound signals from the recorders that could lead them to the aircraft and help unravel the mystery of its fate.
• Finding floating wreckage is key to narrowing the search area, as officials can then use data on currents to backtrack to where the plane hit the water, and where the flight recorders may be.
• Beacons in the black boxes emit "pings" so they can be more easily found, but the batteries only last about a month.
• So far, there's been no sign of the Boeing 777.
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