After their return to the U.S. on 13 May 1909, the brothers and Katharine were invited to the White House where on 10 June, President Taft bestowed awards upon them. Dayton followed up with a lavish two-day homecoming celebration on 17 and 18 June. On 27 July 1909 Orville, with Wilbur assisting, completed the proving flights for the U.S. Army. They met the requirements of an aircraft carrying two persons remaining aloft for an hour, followed by a speed trial demonstrating an average speed of at least . President Taft, his cabinet, plus members of Congress composed the audience of 10,000. Following the successful flights, the Wrights received from the army $25,000, plus $2500 for each mile per hour they exceeded 40 miles per hour. Orville and Katherine then traveled to Germany, where Orville made demonstration flights at Tempelhof in September, including a flight with the Crown Prince of Germany as a passenger. On 4 October 1909, Wilbur made a flight before a million people in the New York City area during the Hudson-Fulton Celebration. Taking off from Governors Island, Wilbur flew up the Hudson River to Grant's Tomb, and back to Governors Island for a landing, with a canoe attached to the aircraft's framework, as a safety precaution in the case of ditching. Wilbur then trained three military pilots at the College Park Airport, Frank P. Lahm, Frederick E. Humphreys, and Benjamin Foulois.