1. A “Sky Ladder” made of Fireworks Igniting as It Drifts into the Sky: On June 15, at the break of dawn, artist Cai Guo-Qiang set off a giant white balloon filled with 6,200 cubic meters of helium. As the orb ascended above Huiyu Island Harbour in Quanzhou, China, it carried with it a 500-meter-long…