<!--
var ar = new Array(
"<p>Part of the inspiration for the design of the PSA came from the movie \"Star Wars.\"</p>",
"<p>The PSA is designed to assist astronauts with their jobs and to make sure a spacecraft is safe.</p>",
"<p>The idea for the PSA surfaced in the late 1990s from a team researching mobile computing on spacecraft.</p>",
"<p>The PSA will move at about one yard a second.</p>",
"<p>The soonest a PSA might go into space would be 2007.</p>",
"<p>A key role for the PSA will be its ability to act as a liaison between the crew and ground controllers.</p>",
"<p>The PSA will weigh only about 4 pounds (1.8 kilograms) and will be maneuvered by small fans.</p>",
"<p>The PSA could identify gas leaks, warn astronauts about dangerous temperature changes, and check up on a payload.</p>",
"<p>Eventually, there will be PSAs of all shapes, sizes and colors - some even with arms - performing a wide variety of tasks on various spacecraft.</p>",
"<p>The PSA's plastic shell was built at Ames through a process called stereo-lithography that reads graphic designs and kicks out a product. A soft shell will likely cover the final PSA.</p>",
"<p>The PSA is meant to do routine tasks as well as assist during emergencies.</p>",
"<p>The PSA is being designed for use with a wide variety of spacecraft, and also for use with any future human flights to Mars.</p>",
"<p>The PSA's main advantage is that it will be able to float to cramped trouble spots immediately, hone in on dangerous areas and remedy problems on demand.</p>",
"<p>The PSA will be able to provide ground control with remote views of mission operations.</p>",
"<p>The PSA will be taught to speak and understand English at first, and will later be taught to take commands in Russian.</p>",
"<p>The PSA will be able to float to trouble spots immediately - even working in teams - zeroing in on the precise location of a dangerous accumulation of gases or heat.</p>",
"<p>The PSA will be about the size of a basketball and will have sensors for measuring gases, temperature, and air pressure.</p>"
);
var num = Math.floor(Math.random() * ar.length);
document.write(ar[num]);
// -->