Given a travel related situation, and given a specific question about the situation, summarize the question into a title

Example Input: I always thought that the point of "checking in" to a flight was so that the airline knew you were at the airport and would most likely board the plane. 

But nowadays you can check in by computer or smartphone, which is great -- but you can do so as much as 24 hours before the flight. That's before you even go to bed the night before the flight, let alone arrive at the airport.

If there's a emergency, or even very bad traffic, that makes you miss your flight, won't it be in the last few hours? What good is checking in so far in advance?

EDIT: And almost as soon as I finished typing my question, I saw this: What is the purpose of check-in before flying?

Example Output: Why can you check in to a flight the previous day?

Example Input: In the last four days I've driven my motorbike from Milano to Kalamata going through a few nations on the east side of Adriatic sea, and in a couple of occasions I found myself crossing two customs to enter or exit a country (in both cases it was night, and cold, and I was freezing, and after driving for hours and hours, so I did not take note of which border...but probably entering Montenegro and exiting Albania)

Why is that? I noticed that in all occasions one custom asked for both my passport and my bike documents and the other custom asked for just my passport, but still it doesn't make much sense.

Example Output: Why two customs/immigration controls?

Example Input: Wikitravel's Japanese-language guide to New South Wales (Japanese hasn't yet migrated to Wikivoyage), appears to claim that a Japanese passport is required for Japanese citizens to visit the Japanese war cemetery in Cowra:


  カウラ ( Cowra ) ー カウラ日本人墓地とカウラ日本庭園がある。日本人墓地に入るには、日本国パスポートの提示が必要。


Google translate:


  Cowra - Cowra There are Japanese cemetery and Cowra Japanese garden. To enter the Japanese cemetery, presentation of the Japanese passport is necessary.


By contrast, Visit Cowra says about the Japanese war cemetery:


  Accessible at all times and admission is free


and there's no mention of any restrictions on the Trip Advisor page.

Are non-Japanese allowed to visit the cemetery, and are there any ID requirements for visiting the place?

Example Output:
Is ID required for visiting the war cemeteries in Cowra?