India, March 19 -- Top Trump administration national security officials facing back-to-back congressional hearings starting on Wednesday are expected to be pressed on the war in Iran, including a deadly strike on a school, as well as the FBI's Capacity to prevent terror attacks inside the United States.

The annual worldwide threats hearings involving the Government's senior-most intelligence officials are taking place at a time of scrutiny over the US military campaign in West Asia and heightened concerns about terrorism in the homeland following recent attacks at a Michigan synagogue and a Virginia university.

The testimony before the House and Senate intelligence committees is expected to centre on the war and in particular, the revel...