instruction:
Given a travel related situation, and given a specific question about the situation, summarize the question into a title
question:
I've heard conflicting news stories and hearsay regarding the topic: Can I take a laptop (and also a digital SLR camera with a lithium rechargeable battery) as carry-on luggage on a flight from mainland Europe to the US? Is this policy expected to change in the next few weeks?

answer:
Are laptops currently allowed in carry-on luggage from Europe to the US?

question:
I have a ticket (see below for the actual ticket) on a weekend, and intend to use it to travel from St Pancras to Brighton and back. It says that it is not valid on the London Underground.

Can I use it on the Overground to travel from an Overground station to Euston, transfer to St Pancras and continue my day journey, then return to St Pancras in the evening and use the return ticket to travel from Euston to another Overground station?

answer:
Is a Super Off Peak ThamesLink fare accepted on the London Overground?

question:
In the AAdvantage program, there are 3 statuses, Gold, Platinum and Platinum Executive. The Platinum has a "72-hour upgrade window". The Executive has a 100-hour window. I assume this refers to when you can sign up for an upgrade and essentially get in line for an unsold first class seat.

Do all these seats invariably go to Executive members, or do Platinum members have a chance at them? In other words, what I am thinking is that if there are dozens of Platinum members on a flight in economy and they all sign up for an upgrade, then there might a long list of Executive members in the line for just a handful of first class seats. But if there are not so many Executive members, then maybe Platinum members would have a shot at those seats.

What is the common experience?

answer:
Probability of first-class upgrade with only Platinum status?