- Summary- Companies- New package would bring U.S. aid to almost $100 billion- U.S. officials say one Patriot system won't change war- Russia threatens oil output cut in response to price capWASHINGTON/KYIV, Dec 23 (Reuters) - The U.S. House of Representatives gave final approval on Friday to a $45 billion aid package for Ukraine, as President Volodymyr Zelenskiy warned his citizens that Russia could launch attacks over Christmas and urged them to heed air raid alarms.Zelenskiy returned from Washington - his first trip outside of Ukraine since Russia invaded on Feb. 24 - with the pledge by the United States of a Patriot surface-to-air missile battery to bolster his hard-pressed air defenses.U.S. officials say, however, that the single Patriot battery that Biden promised Zelenskiy during their White House meeting on Wednesday will not change the course of the war.Kyiv and the Biden administration are wary that retaining U.S. congressional support for aid could become more complicated when Republicans take a slim majority in the House next year: some rightwing Republicans oppose aid and other lawmakers have called for tighter oversight.In the Russia-held portion of neighbouring Zaporizhzhia region, the Russia-installed governor, Yevgeny Balitsky, said shelling of the nuclear power plant there had "almost stopped" but Russian troops would not leave."