Space Shuttle Endeavour’s last flight to orbit is delayed at least 72 hours because of a problem with heaters on one of its three auxiliary power units (APUs).

The APUs are fueled by highly toxic hydrazine and provide power to the hydraulic systems that help steer the shuttle on ascent and landing. On launch, they gimble the main engines to steer the shuttle to orbit. During landings, they are responsible for controlling the brakes and wing surfaces.

NASA officials say the delay will be at least 72 hours. Astronauts were on their way to the pad and President Barack Obama was en route to the Kennedy Space Center when the scrub was announced. Endeavour will now be drained of fuel and engineers will inspect the units and determine how long to delay the launch.

President Obama and his family arrived at the space center about 2 p.m. and were expected to take a tour before Obama was to speak at a community college commencement in Miami.

Lon Seidman

Lon Seidman

Lon Seidman is the host and producer of “Lon.TV,” a consumer technology video show that is on a number of platforms including YouTube and Amazon. He creates in-depth, consumer-friendly product reviews and commentary. His YouTube channel has over 300,000 subscribers and more than 100 million views.

In addition to being a full-time content creator, Lon is an adjunct faculty member at the University of Hartford (his alma mater) where he teaches a course in entrepreneurial content creation.

Prior to becoming a full-time creator, Lon was a partner at The Safety Zone, his family’s business that manufactures gloves and safety equipment. The company has locations around the globe and employs over 200 people worldwide. The Safety Zone was acquired by the Genuine Parts Corporation in 2016.

Lon is also active in public service, serving as the Chairman of the Essex Board of Education, a member of the Region 4 Board of Education, and as the Secretary / Treasurer of the Connecticut Association of Boards of Education. He was endorsed by both Democrats and Republicans for his re-election in 2021.

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