South Africa is grappling with another stark episode of gun violence after attackers in a minibus swept through an informal settlement near Johannesburg, killing 12 people and wounding at least nine, with police now pursuing more than 10 suspects and still searching for a motive. In Belfast, tensions remain high after a stabbing left Stephen Ogilvie seriously injured, prompting a court appearance for the accused and a plea for calm from Ogilvie’s family as unrest, arson and anti-immigration-fueled disorder spread through the city. In India, the resignation of Rajya Sabha member Sushmita Dev has deepened signs of strain inside the Trinamool Congress, marking a second high-profile parliamentary exit in days. And in a more hopeful turn, students from 10 U.S. states have advanced as semifinalists in the Mott Million Dollar Challenge, with young innovators set to present their ideas in Flint this weekend.