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

Input: Consider Input: Most questions related to port of entry that I've seen around here are asked in the context of visiting the country and not visiting the issuing country. Mine is different.

This is the first time I'm travelling to Europe. I'm travelling to Italy and Greece (7 nights in Italy, 8 nights in Greece) via Air France flights. I'll first land in Paris CDG airport from Bangalore, India and then I catch a connecting flight Air France flight to Rome, Italy (4 hours gap between flights). I've been issued a Schengen Visa from Greece (as I'll spend the longest duration in Greece) and I'll NOT be deviating from the itinerary presented to Greece Embassy.

Where should I clear my immigration to get the Schengen entry stamp on my passport? Someone told me that I should clear immigration in CDG Paris, but was not sure about this. Could someone clarify this for me? Assuming the above is the case, I also have a follow up question. What if both my flights arrive and depart from the same terminal in CDG Paris?


Output: First port of entry a Schengen Visa (connecting flights)


Input: Consider Input: I'm a permanent United States citizen (by birth), but I don't have an SSN. I'm also a foreign citizen. My employer outside of the US wants to send me to work into the US for client on-site by asking for a work US visa that would be put into my foreign passport.

Is it legal to obtain and enter the US as a foreigner with such a visa, being at the same time a US resident? Can I enter the US as an American, but work as a foreigner?

I found this reference:


  A foreign national or alien entering the U.S. is generally required to
  present a passport and valid visa issued by a U.S. Consular Official,
  unless they are a citizen of a country eligible for the Visa Waiver
  Program, or are a lawful permanent resident of the U.S. or a citizen
  of Canada.



Output: Is it legal to enter the US with a US visa while being a US citizen?


Input: Consider Input: When I was in Barcelona I saw many bike sharing stations in the city, belonging to a program called Bicing. Remembering how convenient it was to use the service in London, I decided to try and register. However their website was in Spanish/Catalan and the stations themselves didn't have a registration option, so I gave up. Reading up on Bicing later on I've found the following paragraph on Wiki:


  The Bicing member cards are only sent to addresses in Catalonia in an attempt to prevent tourists from using the system.


Is this still true as of 2016? If so, is it possible to register and send a Bicing card to a friend's/hotel's address?

The official website also mentions an "In person" ("De manera presencial") registration option. Is it possible for a tourist to use that instead?



Output: How can a tourist register for the Bicing bicycle sharing in Barcelona?