Jack 'o Lantern:
Copyright © Google
Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at https://www.apache.org/licenses/LICENSE-2.0. Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.
World Trade Center
Robert on Flickr
CC-BY-SA 2.0 Generic
https://commons.wikimedia.org/wiki/File:North_face_south_tower_after_pla...
Room 641A
Mark Klein
CC-BY 3.0 Generic
https://en.wikipedia.org/wiki/File:Room_641A_exterior.jpg
Edward Snowden in 2013
Lauren Poitras/Praxis Films
CC-BY 3.0
https://commons.wikimedia.org/wiki/File:Edward_Snowden-2.jpg
Crow with cookie
Paul Danese
CC-BY-SA 4.0
https://commons.wikimedia.org/wiki/File:PD106514-ARW_american_crow_scave...
Dislike
Kvarki1
CC-BY-SA 3.0
https://commons.wikimedia.org/wiki/File:Dislike.svg
Spy emoji
Twitter, Inc. and contributors
CC-BY 4.0
Padlock
M.B., Jr.
CC-BY-SA 4.0
https://commons.wikimedia.org/wiki/File:Padlock_with_lattice_background.png
Key
Tomascz Sienicki
CC-BY-SA 3.0
https://commons.wikimedia.org/wiki/File:KLCZ_EXP_108_(ubt).JPG
Respect
under_volcano
CC-BY-SA 2.0
https://commons.wikimedia.org/wiki/File:Calgary,_Beltline_(10529157014).jpg
Target
VideoPlasty
CC-BY-SA 4.0