I want to know the answer to the following question:
Where was the first HD video conferencing system displayed?
All the background I'm provided with is that "In May 2005, the first high definition video conferencing systems, produced by LifeSize Communications, were displayed at the Interop trade show in Las Vegas, Nevada, able to provide video at 30 frames per second with a 1280 by 720 display resolution.". Is that enough to answer the question?
Answer: yes