Iran claimed on Tuesday that it had created a hypersonic missile capable of traveling at 15 times the speed of sound, adding a new weapon to its arsenal as tensions remain high with the United States over Tehran’s nuclear program.

The new missile—called Fattah, or “Conqueror” in Farsi—was unveiled even as Iran said it would reopen its diplomatic posts on Tuesday in Saudi Arabia after reaching a détente with Riyadh following years of conflict.