Musk’s rare public expression of regret suggests he is trying to defuse tensions after Trump threatened to retaliate against his companies during their feud.
The financial market slide picked up momentum shortly after the White House said Chinese imports would face tariffs of 145 percent, not 125 percent as Trump previously touted.
Landing tests at Johnston Atoll in the Pacific could advance a plan to use rockets to ship military cargo but could also threaten an important nesting site.