Russia warned Israel against its strikes on Iranian nuclear sites, saying it puts the world on the "brink of a catastrophe". Israel has struck nuclear facilities across Iran, including at Bushehr, Natanz, Isfahan, and Arak. It accuses Iran of seeking to build a nuclear bomb. Tehran says its nuclear program is for civilian energy purposes.

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.