White police officer shot black motorist during traffic stop.
Rolls back policy that has deeply divided organization's membership.
Promises to exercise his veto if Congress rejects agreement.
Lawmakers reached historic decision in late-night session that lasted thirteen hours.
Group takes major step toward dismantling divisive policy.
Plan would see troop level drop to about 450K soldiers by end of 2017.
Requires most schoolchildren to be vaccinated against diseases including measles and whooping cough.
Inmate caught two days after accomplice shot and killed.
Louisiana gunman also injured several others before shooting himself.
Increase to $15 per hour would cover 180,000 workers statewide.
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