diff --git a/docs/preso/03-PassTheSalt/pass-the-salt-2019-d4.pdf b/docs/preso/03-PassTheSalt/pass-the-salt-2019-d4.pdf new file mode 100644 index 0000000..f65aa70 Binary files /dev/null and b/docs/preso/03-PassTheSalt/pass-the-salt-2019-d4.pdf differ