OTTAWA—A “series of reckless acts and omissions” by Iranian authorities resulted in the fatal downing of a passenger jet in January 2020, according to a Canadian government summary of a forensic report. The official document from the Prime Minister’s Office says Iran showed a “blatant disregard” for air safety by failing to provide any information to airlines about its military activities when it launched a missile strike against a pair of U.S. bases across the border in Iraq hours before the plane was shot down. All 176 people on board Ukraine International Airlines Flight 752 were killed, including 55 Canadian citizens, 30 permanent residents and dozens of others bound for Canada. The Tehran-Kyiv route has been a popular first leg of a trip from Iran to Canada. “A series of reckless acts and omissions by Iranian civil and military authorities caused a dangerous situation where risks were underestimated and not …