Dorothy laid her second egg this morning at 11:52am (Daylight Savings Time). Nora, who posts on the CMNH Falcon Forums, captured the first photos of it. Here you can clearly see both eggs just minutes after the second one was laid.
Wildearth.tv is archiving footage from the streaming cams so I found and marked the timeframe in which Dorothy laid the egg. Then Bill Powers of PixController kindly posted it on YouTube here. It's amazing to watch.
Meanwhile, as of 8:45pm tonight Tasha2 at the Gulf Tower has not yet laid her first egg. She's not late though. She usually lays on or before St. Patrick's Day.
For more information on peregrines, see the Peregrine FAQs.
(photo from the National Aviary snapshot webcam at the Univ of Pittsburgh, and thanks to Nora's quick reflexes)