FILE - In this Sept. 13, 2019, file photo the logo for Union Pacific appears above a trading post on the floor of the New York Stock Exchange. A federal judge has blocked one of Union Pacific's main unions from going on strike over its concerns about the railroad's efforts to protect employees from the coronavirus. Judge Brian Buescher ruled Thursday, Jan. 7, 2021 that the union must address its concerns through contract talks with the railroad and it doesn't have the right to strike now. (AP Photo/Richard Drew, File)