A landslide at a landfill in Guinea's capital killed 30 people, the government said on Sunday, after heavy rains overnight prompted the collapse of a massive mound of waste that engulfed nearby tents and shacks.The incident occurred less than a week after the government announced plans to close the site and relocate the waste because of the threat it posed, especially during the ongoing rainy season, which causes landslides and fatal flash floods each year in crowded, underdeveloped cities...