A House panel is set to hold a public hearing on May 16 on "unidentified aerial phenomena," popularly known as UFOs, a high-profile moment for a controversial topic that has long been relegated to the fringes of public politics.
Mandatory Credit:	Sarah Silbiger/Getty Images

A House panel is set to hold a public hearing on May 16 on "unidentified aerial phenomena," popularly known as UFOs, a high-profile moment for a controversial topic that has long been relegated to the fringes of public politics.
Mandatory Credit: Sarah Silbiger/Getty Images

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Key lawmaker warns at UFO hearing: 'Unidentified aerial phenomena are a potential national security threat'

Key lawmakers warned at a House hearing on Tuesday that unidentified aerial phenomena -- popularly known as UFOs -- must be investigated and taken seriously as a potential threat to national security.