Defence Minister Rajnath Singh and United States Defence Secretary Mark Esper reviewed bilateral defence co-operation between both the countries today. Mr. Singh during a telephonic conversation with his US counterpart this evening discussed issues of mutual interest.<br />''<br />''The two leaders have been in regular touch with each other.<br />''<span style="color: #222222;">The conversation held today, on Mark Esper's request, was in continuation of this mutual exchange between India and the United States.</span><br />