Light Speed question
 

2 spaceships.
both look like cars.
both traveling at lightspeed.
one following the other.

would the one in front be able to see the headlights of the one behind it?

Moot question.

Insufficient localized mass would exist (under known physical laws) to enable such an object to travel at light speed. At light speed it would have an infinite mass; which is an impossible discontinuity.

interesting question.

assuming something could travel at that speed without the problems mazer has suggested it would be difficult to answer because light has wave and particle properties. if the wave theory is used then no you could not, if the particle theory was used, then yes you could.