Roger Stone, a political adviser to former President Donald Trump, said that he appeared before a congressional committee investigating the January 6 attack on the U.S. Capitol, but said he refused to answer questions #News #Reuters #RogerStone #January6Capitolattack #Capitolattack #Jan6 Subscribe: http://smarturl.it/reuterssubscribe Reuters brings you the latest business, finance and breaking news video from around the globe. Our reputation for accuracy and impartiality is unparalleled. Get the latest news on: http://reuters.com/ Follow Reuters on Facebook: https://www.facebook.com/Reuters Follow Reuters on Twitter: https://twitter.com/Reuters Follow Reuters on Instagram: https://www.instagram.com/reuters/?hl=en