Officials said a training exercise with flights is planned Thursday and Friday in the Washington area for the North American Aerospace Defense Command.
Continental United States NORAD officials said the flights will improve NORAD's intercept and identification operations. The National Capital Region visual warning system will also be tested Thursday.
NORAD's exercises are designed to ensure NORAD can respond rapidly to air safety threats.
If inclement weather is expected Thursday night or Friday morning, officials say the exercise will be delayed 24 hours.