Several tonnes of highly explosive material found at Beirut’s port, just weeks after the same chemical was blamed for causing a massive detonation there, had been in storage for 15 years, the Lebanese president said on Friday. The army said on Sept. 2 it had discovered a stockpile close to the port of 4.35 tonnes of ammonium nitrate, the highly explosive chemical blamed for the huge Aug. 4 blast that killed about 190 people and ruined a swathe of Beirut. Critics said the lack of proper care and attention in storing such highly explosive material revealed the depth of dysfunction in the way Lebanon has been governed.