The opening moves of the next major war could unfold hundreds of miles above Earth.U.S. adversaries are looking at ways to blind American forces in future conflict by jamming communications, disabling GPS, using lasers to attack satellites or destroying them completely.A sweeping new Defense Intelligence Agency assessment details how China and Russia are developing sophisticated ways to disrupt or destroy U.S. satellites. This includes a Russian satellite designed to carry a nuclear weapon into Earth's orbit.American forces rely on satellites to communicate across battlefields, navigate ships...