Barack Obama added his name to world leaders who have condemned the deadly attack on a bus carrying Israeli tourists in Bulgaria.
"The United States will stand with our allies, and provide whatever assistance is necessary to identify and bring to justice the perpetrators of this attack," Obama said in a statement, calling the attack "completely outrageous."
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The deputy sheriff stood outside Marjory Douglas Stoneman school, watching the western entrance of the school for more than four minutes.
The day will feel cold, especially along the east coast where there is also a small chance of catching the odd wintry shower.
However, Barnaby Joyce will not resign from parliament which ensures Prime Minister Malcolm Turnbull's single-seat majority is maintained.