SOFIA, Bulgaria — Bulgaria's health minister says a tourist bus has flipped over on a highway near Sofia, the capital, killing at least 15 people and leaving 27 others injured.[gh:iframe src="https://omny.fm/shows/ap-news-headlines/playlists/podcast/embed?style=artwork" width="100%" height="180" frameborder="0"][/gh:iframe]Police said a bus carrying tourists on a weekend trip to a nearby resort overturned and then fell down a side road 66 feet below [...]