Should a 2LT salute a 1LT?

Yes, a 2LT should salute a 1LT. I did when I was a 2LT. It is about respect, and unlike the LTC who disagrees, I led by example. I am sure the LTC salutes or saluted Colonels. Though by his reasoning he shouldn't have to. After all, a colonel is a colonel, right?

Anyone who is in higher rank than me will get a salute no matter what.

I believe a 2nd Lt should salute a 1st Lt.

When is was on active duty, a butter bar did not salute and Silver bar. If a butter bar sees you walking done the street and you miss them the LT will lose their mine. but LTs to LTs not the reg says to lower ranks. End of discussion

It doesn’t matter which branch you’re in. The O-1 should be saluting the O-2...

Yes, always. Unless the 2nd luey is wearing the CMH

I think most people (In the most popular responses to this comment) are ignoring the question posed in the title. Should a 2LT salute a 1LT? By reg, yes, but I've been in several different units where 2LTs never saluted 1LTs. I've also seen 1LTs threaten 2LTs not to salute them because they are just "LT's". Read the entire thread, don't bash the person for "Even asking the question". There are rules that people bend and unwritten rules that people follow in all aspects of life. Bashing people on here leads to fellow officers and NCO's thinking their questions are "stupid" and will begin to shy away from the forum.

You do not necessarily salute the man as much as you salute the rank. At one time you would salute a flag officer's car, if the stars were shown, without knowing if the flag officer was in the car or not.

By the book. A butter bar salutes a silver bar.

The very short answer is YES to the extent that the 1LT is in a command position within, for example, a company. When there are formations and formal duties, it is only a sign of respect and to a superior in THESE situations. On a more routine scenario, around garrison or in the field, it would be a little over the top in my view. If a 1LT demanded that salute or recognition being in those situations, he or she would find themselves socially ostracized very quickly.