The Infiltration into Aldrich Killian's Mansion was an attempt by Tony Stark to confront the Mandarin.
Stark found a nearby pageant and broke into a broadcasting van in order to use their computers to find out what he needed to know. While inside, Stark was confronted by the cameraman Gary, who froze upon realising who was there as he was a huge fan of Stark and the Avengers, who noted that he had not believed Stark had been killed in the Destruction of his Mansion. Stark amused all of Gary's requests to show his tattoo of Stark and recruited his help.
Using Gary's own satellite connection to hack into A.I.M.'s systems, which the file reported was responsible for Chad Davis' death. Stark watched footage of Aldrich Killian recruited Davis along with Ellen Brandt and Jack Taggart before they were injected with Extremis which enhanced their strength and regrew their limbs. Upon seeing one test subject exploding, Stark realised Killian must have sold his technology to the Ten Rings to use as human weapons.
Stark called Harley Keener, to check on how the suit was doing; with it now fifty eight percent charged, and J.A.R.V.I.S. kept saying the wrong word at the end of each sentence. Asking for the Mandarin's location, Stark heard Miami was it; thinking J.A.R.V.I.S. had misspoke again, Stark asked Keener to read the location. To Stark's shock, the location was correct; this sent Stark into a panic attack, as he did not have any of his armors or a to call in the Avengers to help.
Trying to keep Stark calm as he recalled the Battle of New York which made him panic even more, Keener suggested that Stark build his own gadgets if he would now have to defend himself when he would then confront both Killian and the Mandarin. The sudden thought of being independent and focusing on his work snapped Stark out of his panic attack as he drove away towards a gardening store to buy some supplies.