Trump delivered a speech at this event. But you can't hear what he said

Standing on the White House lawn, US President Donald Trump showed off his new granite helicopter pad.

He used oversized gold scissors to cut a red, white and blue ribbon, and exchanged handshakes with the construction crew.

He had some words to mark the occasion on Monday, local time, but without a microphone in front of him, they did not reach many ears.

Usually, this sort of moment would be captured by the White House press pool.

But days after the president escalated his attacks on American media outlets, the pool reporters were not there.

"Maybe … this is one example of it backfiring just a little bit," a Newsmax presenter watching a silent feed remarked.

The president announced on Friday that he had banned three prominent media outlets from the White House, blocking them from serving as White House pool representatives.

Cable networks CNN and MS Now, and online publisher Politico, were barred "effective immediately" because of their "constant 'reporting' FAKE NEWS", Mr Trump told his Truth Social followers .

Reporters from all three were denied entrance to the White House grounds the next day.

A press pool is when a group of news organisations combine their resources to gather and distribute notes, news, photos and video.

For example, Australian media organisations are currently part of a press pool to share footage of Prime Minister Anthony Albanese on his US trip for the United Nations General Assembly.

The television arm is made up of five networks: The American ABC News, CBS News, NBC News, CNN and Fox News.

They use a rotating schedule to cover the president's movements and share the footage with each other and affiliates.

The remainder of the White House television pool announced it would suspend coverage of Mr Trump.