By Alexander Cornwell, Parisa Hafezi, Jana Choukeir and Ahmed ElimamTEL AVIV/DUBAI (Reuters) -Israel bombed nuclear targets in Iran on Thursday and Iranian missiles hit an Israeli hospital overnight,

The Arrow system intercepts long-range missiles at higher altitudes; the David’s Sling system intercepts them at lower altitudes; while the Iron Dome takes out shorter-range rockets, usually fired from Gaza, or the fragments of missiles already intercepted by other defense systems.

As the attacks by Iran and Israel continue into their sixth day, here's a look at what we know about the conflict, and if the US will deploy troops.