Washington DC [US], July 28 : US President Donald Trump on Tuesday again warned of further military action against Iran, saying he could target key infrastructure, including bridges and power plants, if Tehran fails to reach a deal with Washington. Already, it'll take them many years to ever to rebuild," Trump said during a phone interview with Fox News. The US President also said that power plants could be targeted, describing them as among the most difficult infrastructure projects to rebuild. Asked about Netanyahu's plans during the interview, Trump said the US was already monitoring Iran's nuclear activities. Trump said the US was aware of developments related to Iran's nuclear programme and referred to the Pickaxe Mountain site, which is believed to be linked to Iran's nuclear activities.