He is stationed in Washington DC. It is clear that he created his first copy at the Washington DC Bureau Headquarters which is within the Eastern Time Zone. Hence the create time 09:00:38 AM is Eastern Time. There is absolutely no evidence that he was instead in Iowa. Notice also that the DCSA103 is consistent with his ID. DCSA would be DC Bureau and SA is obviously Scott Applewhite. Also the caption writer JSA RCL**DC** obviously was also stationed at the AP Washington DC Bureau. Also, Applewhite is a photographer not a reported. There would be no reason for him to attend the press gaggle at the White House.