During his first term, President Trump’s signature border security policy involved building a barrier along the southern ...

Some experts and observers have said Muan International Airport’s localizer — a concrete fence at the end of the runway that houses a set of antennas designed to guide aircraft safely during ...

Bollard-style fencing made of steel and/or concrete measuring up to 30 feet tall. Vehicle barriers: Four to six-foot tall steel posts and X-shaped fences called "Normandy barriers." Other barriers ...