KABUL - A senior US logistics commander rejected accusations on Sunday from front-line combat troops that the complicated rollback from bases across Afghanistan and packing up of military equipment was disrupting NATO-led operations against insurgents.US Brigadier-General Steven Shapiro said around 400 bases had been successfully closed or handed to Afghan security forces from a high of around 800 last October as part of a withdrawal of foreign troops from combat operations winding up in 2014."To the soldiers out on patrol, it's transparent," said Shapiro, in charge of transferring excess non-military equipment to Afghan forces.