on the cost, and why it doesn t address the problem, or, for some, go far enough. nearly two dozen killed in ukraine after russian rockets strike a train station. cbs debora patta is in kyiv, tonight, where the world is marking six months of war. the new move tonight by the federal government to get untraceable ghost guns off the streets. cbs jeff pegues shows us why these guns are so dangerous. reporter: this is a ghost gun. it s something that can be produced on a printer, that you can get for less than $200. o donnell: and, we ve all heard about the summer slump. but, what impact did the pandemic have on america s school children? the startling details, with cbs meg oliver. this is the cbs evening news with norah o donnell, reporting from the nation s capital. o donnell: good evening to our viewers in the west and thank you for joining us on this wednesday night. tonight, president biden offers relief for millions of americans burdened with federal student loans