Amazon has suspended its drone delivery operations in the U.S. following two crashes at a testing facility in Pendleton, Oregon. The incidents occurred in rainy weather, raising concerns about the reliability of the Prime Air program. The company is set to pause operations in Texas and Arizona until a software update is implemented on its drone fleet. Amazon's drone initiative has faced multiple challenges, including the departure of key executives and a previous halt of operations in California. Despite setbacks, Amazon aims to expand drone delivery tests internationally.