U.S. officials: Russia has fired into Ukraine
The U.S. and Ukraine are accusing Russia of launching artillery attacks on Ukrainian troops from Russian soil and preparing to move more heavy weapons over the border. Over the past two weeks, half a dozen artillery barrages have already been fired from southern Russia. David Martin reports.
What to Read Next
'The Walking Dead' Season 5 Finale Questions: Who Will Live? Who Will Get Exiled? Where Is Morgan?!