Will have conducted

"North Korea has fired a missile over Japan’s main island and into the sea – again violating UN resolutions and adding to tensions in the region. The missile took off from a site near Pyongyangjust after 6am local time on Tuesday and flew across Hokkaido before breaking up into three parts and coming down east of the island.

The Japanese military’s early warning system detected the missile, triggering air-raid warnings in northern Japan including sirens and text messages saying “Missile passing. Missile passing … Please take cover in secure buildings or underground.” There was no attempt to shoot it down, though a government spokesman said such a launch posed a “serious, grave security threat” to Japan.

Kim Jong-un’s regime will have conducted the launch to show that Japan and other US allies or territories are in reach of its intermediate-range Hwasong-12 missile – the same type North Korea recently threatened to launch towards the US Pacific possession of Guam – and to reinforce its displeasure at joint US-South Korea defence exercises that are under way." (The Guardian.)

Why is the future perfect "will have conducted", instead of the present perfect ("have/has conducted"), used in the context above?