by Joshua Howat Berger Agence France Presse   MEXICO CITY, Mexico (AFP) — A 7.2-magnitude earthquake that rattled Mexico on Friday triggered a tragedy when a minister’s helicopter killed 13 people during a crash-landing on the way to the epicenter. The UH-60 Black Hawk military helicopter landed on its side, crushing a van. There were no reported casualties from the quake itself, which damaged buildings. The chopper was carrying Interior Minister Alfonso Navarrete and […]