It is assumed that the trip will take place along the surface or close to it,
so the refractive index of air of 1.0003 has been cranked in:
From each of the following to Baghdad, along the great-circle, at the speed
of light in air . . .
Augusta, ME. . . . . . . . 0.03043 second
Washington DC . . . . . 0.03328 sec
Miami, FL . . . . . . . . . . 0.03744 sec
Chicago, IL. . . . . . . . . 0.03447 sec
St. Louis, MO . . . . . . . 0.03590 sec
Dallas, TX. . . . . . . . . . 0.03877 sec
Houston, TX . . . . . . . 0.03944 sec
Seattle, WA. . . . . . . . 0.03644 sec
Los Angeles, CA. . . . 0.04108 sec
Anchorage, AK. . . . . . 0.03145 sec
Honolulu, HI . . . . . . . 0.04505 sec
The answer is neither.
You could try becoming a ray of light.
No. Nothing with mass can travel at the speed of light.
A man can't travel at the speed of light.A man can't travel at the speed of light.A man can't travel at the speed of light.A man can't travel at the speed of light.
You don't. The only objects that can travel at the speed of light are those that ONLY travel at that speed, like photons or gravitons.
It would turn to energy
Any massless "thing" like a photon and MAYBE a neutrino. NOTHING with mass can travel at the speed of light. Photons travel at the speed of light. The entire electromagnetic spectrum travels at the speed of light.
Neutrinos do not travel at the speed of light, but they do move very close to the speed of light.
Dark does not exist, it is only the absence of light. Darkness is not an entity, so it does not travel and has no speed. In principle, a shadow or nonentity could "travel" faster than the speed of light. For example, if you pivoted a powerful laser a few degrees the point of light would travel across a screen very far away at a "speed" greater than light. Note that this is not at all faster than light motion. You could achieve a similar effect by casting shadows on things very far away. But none of this is actually a "speed."
No, it is not possible to travel at the speed of light in water. Light travels at a slower speed in water compared to its speed in a vacuum, which is about 299,792 kilometers per second. The speed of light in water is approximately 225,000 kilometers per second.
No. Just to travel AT the speed of light would require more energy than the entire universe contains. So all objects move at some fraction of light speed, never 1 nor greater.
Nothing physical is believed to be able to travel twice the speed of light.