This week’s whipsaw chain of events involving Iran, Israel and the United States that culminated in a surprise ceasefire has raised many questions about how the Trump administration will approach the Middle East going forward.

European nations worked Monday to keep alive diplomatic efforts to curb the Israel-Iran war as the two countries traded strikes following the United States’ weekend attack on Iran’s nuclear program.

A meeting between Iran’s foreign minister and senior European diplomats has yielded hopes of further talks but no indication of any immediate concrete breakthrough, a week after the crisis centered on the Iranian nuclear program erupted into war between Israel and Tehran.

Israel and Iran have struck at one another again a week into their war as President Donald Trump weighs U.S. involvement.