Index Figure 1. NASA Breakthrough Propulsion Physics Program Home Page, Feb 5 2003. <http://www.grc.nasa.gov/WWW/bpp/>

Field Drive Figure 2. NASA Glenn Research Center Homepage. <http://www.grc.nasa.gov/>

Figure 3. Millis, Marc G. "The Challenge to Create Space Drive," Jan 7 1997.

Collision Sails <http://www.grc.nasa.gov/WWW/bpp/TM-107289.htm>

Figure 4. Millis, Marc G. "The Challenge to Create Space Drive," Jan 7 1997.

ASTP <http://www.grc.nasa.gov/WWW/bpp/TM-107289.htm>

Figure 5. Millis, Marc G. "The Challenge to Create Space Drive," Jan 7 1997.

Fission and <http://www.grc.nasa.gov/WWW/bpp/TM-107289.htm>

Antimatter Figure 6. Marshall Space Flight Center, Nov 26 2003. <http://www1.msfc.nasa.gov/NEWSROOM/news/photos/2003/photos03-203.html>

1. High-Powered Electrical Propulsion <http://www.highway2space.com/sciresearch/nuclear_prop.html>

2. Millis, Marc G. "The Challenge to Create Space Drive," Jan 7 1997.

<http://www.grc.nasa.gov/WWW/bpp/TM-107289.htm>

3. Moyer, Michael. "Space Sailing by Sunlight," Jan 29 2003. <http://www.popsci.com/popsci/aviation/article/0,12543,337873,00.html>

4. "NASA, Air Force Acheive Key Milestones on Next-Generation Engine," Nov 20 2003.

<http://www1.msfc.nasa.gov/NEWSROOM/news/releases/2003/03-203.html>

5. Revolutionary Propulsion Research. <http://www.highway2space.com/ast/revolutionary.html>