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

[Q]: When I was in Morocco, I was disappointed to find out non-Muslims, in general, aren't permitted in mosques in the country, but I heard this isn't the case in some other countries. I'm headed to Malaysia soon and might want to step inside some mosques when I'm there.

Are non-Muslims permitted to enter mosques in Malaysia?

[A]: Are non-Muslims allowed to enter mosques in Malaysia?


[Q]: I have been invited to a conference in USA. I am going to apply for a B1 visa. Unfortunately the invitation letter doesn't have a signature on it. Only the email id and the website is there. Would the letter be valid in this case?

[A]: Is a signature mandatory for a B1 visa invitation letter?


[Q]: In a few days, I will be traveling alone from London Heathrow to King's Cross station at about 1am via night bus. I have read a lot of conflicting information on the safety of night buses, and I have begun to alarm myself.

Is lugging a rather large suit case across most of London at 1 in the morning going to be a safety concern (i.e. is it worth shelling out a rather large sum of money for a taxi?), or should I be fine?  

Is there anything I should know or avoid doing?

[A]:
London night bus safety