Summary: In our news wrap Monday, authorities are searching for answers after a gunman killed 18 people in Nova Scotia over the weekend. It was Canada's deadliest mass shooting ever. Also, Israeli Prime Minister Benjamin Netanyahu and main rival Benny Gantz reached a coalition deal that will end a year-long political standoff. Netanyahu will remain in his role for the next 18 months, followed by Gantz. PBS NewsHour is supported by - https://www.pbs.org/newshour/about/funders
