FinanceExxonMobil's $20 billion hit 'continues trend' of large oil and gas industry write-downsUS supermajor following in footsteps of peers in cutting costs and striking assets from development plans, analyst saysHigh pressure: With analysts piling on ExxonMobil after the supermajor announced impairments of $17 billion to $20 billion on natural gas assets, peace and tranquility may be in short supply for chief executive Darren Woods.Photo: RYTIS DAUKANTAS/UPSTREAMJennifer Lynn PresleyHouston