This just seen in the WSJ:
The person briefed on the Lebanese military investigation said that members of Lebanon’s top security agency, the General Security, became aware of the ammonium nitrate last month and wrote a letter to the authorities on July 20, requesting that it be secured.
Mr. Diab received the document on July 20, according to one of his advisers. On July 22, Mr. Diab sent it to Lebanon’s Supreme Defense Council for comment. Mr. Diab discussed the issue with officials on the day of the blast, according to the adviser.
On the day of the explosion, port workers were sent to carry out the welding on the warehouse to secure the facility, according to the prime minister’s adviser and the person briefed on the investigation. The works are then suspected to have ignited confiscated fireworks or ammunition nearby, the person said.
"A pessimist sees the difficulty in every opportunity, an optimist sees the opportunity in every difficulty” ---Sir Winston Churchill
"Political extremism involves two prime ingredients: an excessively simple diagnosis of the world's ills, and a conviction that there are identifiable villains back of it all." ---John W. Gardner
“You can’t go back and change the beginning, but you can start where you are and change the ending.” ---C. S. Lewis