US, Taliban keep open door to talks after summit scrapped

The United States and Afghanistan's Taliban on Sunday both left the door open to fresh talks after President Donald Trump abruptly canceled a secret summit, but the insurgents threatened to inflict greater costs.The United States also said it would not relent in fighting the militants after Trump cited a Taliban attack that killed a US soldier for scuttling the unprecedented meeting.Trump said he had invited Taliban leaders, as well as Afghan President Ashraf Ghani, for talks Sunday at the presi