A ferry rated to carry 100 passengers but carrying at least 200 sank in swift waters in the Tigris River in Mosul, Iraq, on March 21, killing more than 80 people. The ship, most of whose passengers were Kurds celebrating Nowruz, or New Year, was heading to Umm Rabaen, a river island popular with tourists, north of the city center.

Before the incident, officials had warned boat operators that the level of the Tigris was unusually high, as the gates at Mosul Dam had been opened.

A gunman identified as an Australian white supremacist attacked two mosques in Christchurch, New Zealand, killing at least 50 people and injuring 20 others in what is being described as an act of terrorism.

After being chased off at the second targeted mosque by one of the worshipers, who had picked up an empty, discarded shotgun, the attacker was arrested when police rammed his car a few blocks from the first attack. Police believe he may have been headed to attack a third location....

Packages containing explosives were found in three locations in London on March 5: Heathrow Airport, London City Airport and the Waterloo train station. Another package containing explosives was mailed to the University of Glasgow in Scotland.

A letter sent to British authorities said the devices were sent by the Real Irish Republican Army (Real IRA), a Northern Ireland separatist group classified as a terrorist group by the UK and US. The letter included a code phrase indicating it...