Helicarrier
The moment the call came through, Maria understood. They were going into a war zone - more accurately, they were already in a war zone. She had trained for this all her life, and was in her element.
"Battle stations. Lock the ship down," she ordered. As SHIELD agents ran to their posts, all over the ship, bulkheads closed down on non-essential areas, hopefully protecting those who weren't trained for this as well as keeping them from getting in the way...for one reason or another.
"Launch the jets and the Quinjets," she continued. "Then get us some altitude." The more distance they had from the ground, the better.