diff --git a/slides/BLcourse2.2.key b/slides/BLcourse2.2.key
index 9a48274fffaa2e103a50a02255b29f4f6fe850cc..d24df2ba448c3b64ed18023f46147147e88fc10f 100644
Binary files a/slides/BLcourse2.2.key and b/slides/BLcourse2.2.key differ
diff --git a/slides/BLcourse2.2.pdf b/slides/BLcourse2.2.pdf
index f4365fd1c710710ade108122a1046f829dc940e7..92a9dc873b732f926702fadd0d427879d668f625 100644
Binary files a/slides/BLcourse2.2.pdf and b/slides/BLcourse2.2.pdf differ