US Defense Secretary Lloyd Austin announced $6 billion in new military aid for Ukraine on Friday as Washington rushes to fill gaps left by months of limited American assistance.The package is the second this week, following another valued at $1 billion that was announced just after US President Joe Biden signed a much-delayed bill to provide new funding for Ukraine as it struggles to hold back Russian advances.”I’m… pleased to announce today an additional commitment of $6 billion through our Ukraine Security Assistance Initiative,” Austin told journalists following the conclusion of a…