According to Riviera Maya News (30June2018), Asur, the group that runs several Latino airports, will spend approximately $6.1 billion mx over the next 5 yrs. to upgrade the Cozumel airport and to construct the new Terminal Five at Cancún International Airport.
Also according to RMN, a new ruling from TSA states that as of 30 June international passengers traveling into the USA cannot carry any powdered substance of more than 12 oz. in their hand luggage. This applies to carry-ons only, not checked bags.