Washington (CNN) -- An aborted landing by a plane carrying Michelle Obama because it was too close to a military plane ahead of it was a "serious incident," Transportation Secretary Ray LaHood said Wednesday.
LaHood confirmed that the Federal Aviation Administration was investigating the incident Monday at Andrews Air Force Base.
"We consider any incident like this a serious incident," LaHood said. "It's under investigation, we will get to the bottom of what happened and how it happened, and obviously make sure it doesn't happen again."
He emphasized that the first lady was never in any danger and said he had yet to hear from either Michelle Obama or the president about it.