A shark killed a woman and seriously wounded a man taking an early morning swim with her at a national park beach on Australia’s east coast Thursday, police said. Experts say a shark rarely attacks more than one person. The attack occurred at Crowdy Bay National Park, which is known for beach camping, fishing spots and hiking tracks 224 miles north of Sydney. Beaches in the area and to the north of the attack were closed to swimmers indefinitely, Police Chief Insp. Timothy Bayly said. Emergency services were called to Kylies Beach following reports that two people in their mid-20s...