The Only Easy Day... Was Yesterday

 is a singleplayer level of Call of Duty: Modern Warfare 2. The player controls Gary "Roach" Sanderson. The objective is to take over an oil rig being used as a SAM site by the Russians so Task Force 141, as well as the U.S. Navy and Air Force, can safely assault The Gulag. The player will begin the level by riding on a Swimmer Transportation Device (an aquatic, propeller-driven transport device currently being acquisitioned by the USSOCOM.) from the USS Chicago, a Los Angeles-class submarine, to the oil rig. At various points of the level, the player will have to choose where to breach into a room. After breaking into it, the player will move in slow-motion as they kill the various enemies and save the hostages.

Trivia

 * "The Only Easy Day Was Yesterday" is the motto of the Navy SEALs.
 * In the Art Book, it is stated that originally, there were plans for a Campaign Level that had the player controlling a U.S. Navy SEAL member, leading to the inspiration of this level, and Oil Rig take downs are something SEALs train for. Also, the infiltration method, is via SDVs (SEAL Delivery Vehicles). It is very much so possible, that some of the TF141 members are SEALs themselves
 * As a possible nod to the SOCOM: U.S. Navy SEALs game series, one of the TF141 members that assist in this section call sign is "Boomer", the same name of a SEAL team member from the series.
 * The submarine the player launches from is the U.S.S. Chicago (SSN-721) while Team 2 is launched by the U.S.S. Dallas (SSN-700). Both are Los-Angeles-class submarines.
 * The submarines U.S.S. Chicago and U.S.S. Dallas were both featured in Tom Clancy novels, Red Storm Rising, and The Hunt for Red October, respectively.
 * When fellow TF141s help you out of the water after you take out the guard it is unknown how you get out of your scuba gear, or if you even remove it, before you move out to secure the hostages.
 * The hostages will always be on the player's side of the room, no matter which door is breached.
 * The body the player plants C4 on in one of the rooms is scripted to lay in that location and is dead as soon as the player breaches the room.
 * At the end of the level, the player gains the sniper rifle that they will use in the next level, and there is no way to replace it.
 * This is the only mission in which the Marines are physically seen, as they rope down a helicopter to disarm the SAM sites and rescue the hostages.