i'm stephen sackur. top stories -- safeguarding britain. security services, under intense scrutiny after the brutal murder of a soldier in london. could the british authorities have done more to prevent the killings? officials confirm both suspects were known to the intelligence services. a trail of smoke and a terrifying moment in the skies above london. and jen failure on a passenger jet leads to an emergency landing at heathrow. a collapsed bridge and miraculous rescue in the northwestern united states. drivers are plunged into icy water and lived to tell the tale. and alice is here with the latest on business including tough times for christine lagarde at the imf. the headat is back on of the international monetary fund. she has been called again this friday in a corruption inquiry that threatens to plunge to the fund another leadership crisis. it is seven :00 in the morning in washington, d.c., 1:00 in the afternoon in stockholm and midday here in london where thousands of british muslims are as usual attending friday prayers. mosques