In yet another case of tea-leaf reading, three unnamed U.S. officials told Reuters yesterday that Russia’s military buildup along Ukraine’s border has “expanded” to include blood products and other medical supplies that would allow it to treat casualties, allegedly showing Moscow’s military readiness. Current and former U.S. officials say concrete indicators — like blood supplies — are critical in determining whether Moscow would be prepared to carry out an invasion, if Russian President Vladimir Putin decided to do so.