Cuba has vowed to defend itself against any “terrorist and mercenary aggression”, a day after border guards said they had killed four exiles on a Florida-registered speedboat that opened fire on a patrol.
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But in the worst-case scenario, the Deorbit Vehicle won’t be ready. Without it, a protocol agreed on in 2024, which relies on the Russian Progress spacecraft, could come into play. There will be vexing trade-offs to consider. Allowing the ISS to descend toward Earth on its own saves gas, which the ISS will need when it’s finally time to eject into the atmosphere and ensure a burial at sea. But a slow descent jeopardizes the machinery needed to maintain remote control.
（二）未经变更登记，擅自改变网络线路、电话线路装机地址的；