In March 1978, Smith and non-militant nationalist groups headed by Muzorewa, Sithole and Chief Jeremiah Chirau agreed what became the "Internal Settlement", under which the country would be reconstituted as Zimbabwe Rhodesia in June 1979 after multiracial elections. ZANU and ZAPU were invited to participate, but refused; Nkomo sardonically dubbed Smith's black colleagues "the blacksmiths". The deal was badly received abroad, partly because it kept the police, the military, the judiciary and the civil service in white hands. There would be a senate of 20 blacks and 10 whites, and whites would be reserved 28 out of 100 seats in the new House of Assembly. Smith and Nkomo re-entered negotiations in August 1978, but these ended after ZIPRA shot down an Air Rhodesia passenger flight on 3 September and massacred survivors at the crash site. Smith cut off talks, introduced martial law across most of the country and ordered reprisal attacks on guerrilla positions. Smith, Muzorewa and Sithole toured the US in October 1978 to promote their settlement, and met Kissinger, Ford and others including the future President Ronald Reagan. On 11 December, ZANLA attacked Salisbury's oil storage depot, causing a fire that lasted six days and destroyed a quarter of Rhodesia's fuel. Two months later ZIPRA downed another civilian flight, this time killing all on board.