The U.S. NTSB is assisting Mexico’s Dirección General de Aeronáutica Civil (DGAC) in the investigation into the crash of a chartered Learjet 25 that claimed the life of Mexican-American singer Jenni Rivera early Sunday morning. The twinjet disappeared from radar just minutes after it took off from Monterrey, Mexico, at 3:15 a.m. local time following her concert there, for a flight to Toluca. [Read more…]