Over the past 18 months I've seen a ons post lots of tweets from the Pope, Obama, HRC etc that contained the word 'concrete'.

Could the 'Concrete' connection be freemasonry?

'Masonry, the art and craft of building and fabricating in stone, clay, brick, or concrete block. Construction of poured concrete, reinforced or unreinforced, is often also considered masonry.'

Just a theory.