diff --git a/unit07_tunnelling/.DS_Store b/unit07_tunnelling/.DS_Store index 9985165..a057b2b 100644 Binary files a/unit07_tunnelling/.DS_Store and b/unit07_tunnelling/.DS_Store differ diff --git a/unit07_tunnelling/lecture/unit07_tunnelling.pptx b/unit07_tunnelling/lecture/unit07_tunnelling.pptx index 579a81d..ab8f88c 100644 Binary files a/unit07_tunnelling/lecture/unit07_tunnelling.pptx and b/unit07_tunnelling/lecture/unit07_tunnelling.pptx differ diff --git a/unit07_tunnelling/lecture/~$unit07_tunnelling.pptx b/unit07_tunnelling/lecture/~$unit07_tunnelling.pptx deleted file mode 100644 index b71c76f..0000000 Binary files a/unit07_tunnelling/lecture/~$unit07_tunnelling.pptx and /dev/null differ