Iran likely conducted a failed launch of a satellite-carrying rocket in recent days and now appears to be preparing to try again.

Satellite photos show Iran has begun construction at its Natanz nuclear facility. (Planet Labs Inc. via AP)DUBAI – Iran has begun construction at its Natanz nuclear facility, satellite images released Wednesday show, just as the U.N. nuclear agency acknowledged Tehran is building an underground advanced centrifuge assembly plant after its last one exploded in a reported sabotage attack last summer. “Nothing in Iran regarding its peaceful nuclear program is being done in secret, in full keeping with the JCPOA, and as the IAEA has repeatedly confirmed,” Miryousefi said in an email. Iran maintains its nuclear program is for peaceful purposes, though Western countries fear Tehran could use it to pursue atomic weapons. Despite being one of the most-secure sites in Iran, Natanz was targeted by the Stuxnet computer virus — believed to be the creation of the U.S. and Israel — before the nuclear deal.

(AP Photo/Hussein Malla)Fireworks and ammonium nitrate appear to have been the fuel that ignited a massive explosion that rocked the Lebanese capital of Beirut, experts and videos of the blast suggest. That likely came from a fire that engulfed what initially appeared to be fireworks that were stored at the port. Online videos of the disaster's initial moments show sparks and lights inside the smoke rising from the blaze, just prior to the massive blast. He based his figure on the amount of ammonium nitrate that were reported, but said “we need to be careful with specific statements” due to still incomplete information available. The devastation surrounding the port resembled other ammonium nitrate explosions, such as the 1995 Oklahoma City bombing and a 1947 ship explosion that struck Texas City, Texas.