New York City's fatal pipeline blast focuses new attention on the aging pipeline infrastructure, some of it more than a century old. With the natural gas industry needing at least 29,000 more miles of pipeline to meet new demand, can the system expand and become safer at the same time?
US crash investigators looking into the Asiana accident have provided an unusual amount of information to the public. Is that heading off conspiracy theories or creating confusion?
Investigators are interviewing the flight's pilots and crew to help determine the cause of the Asiana crash at San Francisco International Airport on Saturday. Here are several factors under scrutiny.
Deborah Hersman of the National Transportation Safety Board sees collision-avoidance technology as the future of auto safety. As for a move from NTSB to a post in Obama's cabinet? She declines to say.