Uber Technologies Inc. plans to deliver food by drone in San Diego as part of a wide-reaching commercial test program approved by the federal government on Wednesday, said Dara Khosrowshahi, the chief executive officer. Khosrowshahi said people should expect meal delivery in five to 30 minutes, depending on whether it comes from a drone or a human. \u201cPush a button and get food on your doorstep,\u201d he said. Uber is now the largest food delivery business in the world, Khosrowshahi told the crowd during an on-stage interview with Bloomberg at an Uber conference in Los Angeles. The U.S. Transportation Department said it chose 10 state, local and tribal governments and a handful of companies, including Alphabet Inc., FedEx Corp., Intel Corp., Qualcomm Inc. and Uber, to work together on commercial drone testing. Hamburgers via drone was among a range of topics that Khosrowshahi touched on during the interview at the company\u2019s flying car conference, Uber Elevate. While the CEO said he\u2019d joined Uber last year as a skeptic of the flying car program, he eventually decided to support the futuristic endeavor. \u201cUber can\u2019t just be about cars,\u201d he said. \u201cIt has to be about mobility.\u201d Uber itself isn\u2019t building flying cars. Instead, it\u2019s striking partnerships with companies, along with government agencies like NASA and the U.S. Army, with the hope that pilot programs will begin in 2020. Talk of flying cars - which are many years away from moving around actual customers, if ever - offered a diversion from Uber\u2019s embattled autonomous-car program. Testing has remained grounded since March, when one of its self-driving vehicles struck and killed a pedestrian in Tempe, Arizona. On Wednesday, Khosrowshahi said he expected Uber would resume testing in \u201cthe next few months,\u201d once the National Transportation Safety Board completes its investigation. He said Uber is cooperating with the inquiry. Khosrowshahi then took a jab at Tesla Inc. CEO Elon Musk, who has taken a more combative approach with the agency. \u201cWe will not be tweeting ahead of their findings,\u201d Khosrowshahi said. Khosrowshahi also emphasized Uber\u2019s commitment to electric bicycles following its acquisition of Jump Bikes last month. The business competes with several venture-backed startups offering similar services for renting bikes and scooters around cities using an app. \u201cIf the unit economics and the technology is there, our appetite to invest is infinite,\u201d he said.