North Korea: Pyongyang sent officials back to work at the inter-Korean border liaison office established in September, reversing an abrupt decision to pull the staff. It was unclear whether there was any connection to President Trump’s tweet two days earlier, saying that he had ordered his government to withdraw “additional large scale sanctions” against the North.

New Zealand-China ties: Prime Minister Jacinda Ardern announced that she would make a long-planned trip to Beijing, although the visit would be shortened in light of the mosque attacks in Christchurch. The trip comes amid growing concerns over frayed relations after New Zealand blocked Huawei from working on the country’s planned 5G network.

“Egg boy” speaks: The teenager who cracked an egg on the head of an Australian politician blaming Muslim immigration for the Christchurch massacres said, “I understand what I did was not the right thing to do.” Will Connolly, 17, added, “However, this egg has united the people.”

Climate change: Copenhagen wants to become carbon neutral in the next six years, investing in a combination of wind turbines, a novel garbage incinerator and more transportation options in a vast project that could serve as a model for other cities around the world.

Traveling while female: The rise in the number of solo female travelers is shining a light on the enduring nature of gender violence and social expectations of women in different cultures.

Batman: The caped crusader turns 80 this week, and over the years his guiding principle of protecting innocence has remained the same. Here’s a look back at the key milestones of his career.

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