of its engines at once. and, apart of its power, it's this recycling of the rocket, slashing the cost of the launch that makes this a breakthrough in the business of space travel. two americans have become the first humans to walk- in space without any lifeline to their spaceship. - one of them called it "a piece of cake". - thousands of people have given the yachtswoman ellen macarthur a spectacular homecoming in the cornish port of falmouth, after she smashed the world record for sailing solo around the world non—stop. this is newsday on the bbc. i'm mariko oi in singapore. our headlines... downing street is in turmoil, afterfour senior aides to borisjohnson resign within hours of each other. president biden gives details of how the head of the islamic state group was killed during a raid by us special forces in syria.