Lufthansa grounds planes, Nigerian carriers threaten to stop flying as Iran war strains show
By Joanna Plucinska, Ilona Wissenbach and Isaac Anyaogu LONDON/FRANKFURT/LAGOS, April 16 (Reuters) - Governments and airlines are sounding increasingly urgent alarms about diminishing jet fuel supplies and soaring prices due to the Iran war, as Lufthansa grounded planes, Nigerian carriers threatened