Answering my own question... it's true
June 28, 1914
At around 10:00 a.m., the archducal party left Philipovic army camp, where Franz Ferdinand had performed a brief review of the troops. The motorcade, consisting of six automobiles was headed for City Hall for a reception hosted by Sarajevo's mayor. The chosen route was the wide avenue called Appel Quay, which followed the north bank of the River Miljacka.
In the first automobile rode the Mayor, Fehim Effendi Curcic, and the city's Commissioner of Police, Dr. Gerde. In the second automobile, its top folded down and flying the Hapsburg pennant, rode Franz Ferdinand, Sophie and General Potoirek. The driver and the car's owner, Count Harrach, rode in front. The third automobile in the procession carried the head Franz Ferdinand's military chancellery; Sophie's lady in waiting; Potoirek's chief adjutant, Lieutenant Colonel Merizzi; the car's owner and his driver. The fourth and fifth automobiles carried other members of Franz Ferdinand's staff and assorted Bosnian officials. The sixth automobile was empty -- a spare should one of the others fail.
The morning was sunny and warm. Many of the houses and buildings lining the route were decorated with flags and flowers. Crowds lined the Appel Quay to cheer the imperial couple. Amid the festive crowd mingled seven young assassins. They took up their assigned positions, all but one along the river side of the Appel Quay. First in line was Mehmedbasic, to the west of the Cumurja Bridge. Near him was Cabrinovic. The others were strung out as far back as the Kaiser Bridge.
The Bomb
The motorcade approached and the crowds began to cheer. As Franz Ferdinand's car passed Mehmedbasic, he did nothing. The next man in line, Cabrinovic, had more resolve. He took the bomb from his coat pocket, struck the bomb's percussion cap against a lamp post, took aim and threw the bomb directly at Franz Ferdinand.
In the short time it took the bomb to sail through the air, many small events took place. The car's owner, Count Harrach, hearing the bomb being struck against the lamp post, thought they had suffered a flat tire. "Bravo. Now we'll have to stop." The driver, who must have seen the black object flying, did just the opposite -- he stepped on the accelerator. As a result, the bomb would not land where intended. Franz Ferdinand, also catching a glimpse of the hurtling package, raised his arm to deflect it away from Sophie. She sat to his right, and so was between Franz Ferdinand and Cabrinovic.
The bomb glanced off Franz Ferdinand's arm, bounced off the folded car top and into the street behind them. The explosion injured about a dozen spectators. The third car was hit with fragments and stalled. Merizzi received a bad cut to the back of the head. Others in the party received minor cuts. The first and second cars continued on for a few moments then stopped while everyone assessed who was injured and who was not.
After the Bomb
Cabrinovic swallowed his cyanide and jumped into the river. The trouble was, the poison was old -- it only made him vomit -- and the river was only a few inches deep. He was quickly seized by the crowd and arrested. The motorcade continued on to City Hall, passing the other assassins. Either because they thought Cabrinovic had succeeded or from lack of resolve, they failed to act.
At City Hall, a furious Franz Ferdinand confronted the Mayor. "Mr. Mayor, one comes here for a visit and is received by bombs! It is outrageous!" After a pause to calm himself, he regained his composure and let the Mayor speak. The Mayor, either completely unaware of what had happened, or personally ill equiped for crises, launched into his prepared speech. "Your Royal and Imperial Highness!...Our hearts are full of happiness..."
By the end of the Mayor's speech, Franz Ferdinand had regained his composure and thanked his host for his cordial welcome. Activities at City Hall were observed as planned.
Changed Plans
Discussions were held as to whether to change the rest of Franz Ferdinand's schedule. The Archduke did not wish to cancel his visit to the museum and lunch at the Governor's residence, but wished to alter his plans to include a visit to Merizzi in the hospital.
The same motorcade set out along the Appel Quay, but neither the Mayor's driver, nor Franz Ferdinand's driver had been informed of the change in schedule. This would have been Merizzi's job.
The young assassins had counted on succeeding on the first attempt. With no assurance that Franz Ferdinand would follow his original itinerary, the remaining assassins took up various other positions along the Appel Quay. Gavrilo Princip crossed the Appel Quay and strolled down Franz Joseph Street. He stepped into Moritz Schiller's food store to get a sandwich. As he emerged, he met a friend who inquired about a mutual friend.
The Wrong Turn
The Mayor's car, followed by Franz Ferdinand's car turned off the Appel Quay and onto Franz Joseph Street, as originally planned, to travel to the museum. General Potoirek leaned forward. "What is this? This is the wrong way! We're supposed to take the Appel Quay!" The driver put on the brakes and began to back up. Franz Ferdinand's car stopped directly in front of Schiller's store -- five feet away from Princip.
The Shots
Princip was quick to recognize what had happened. He pulled the pistol from his pocket, took a step towards the car and fired twice. General Potoirek happened to look directly at Princip as he fired. He thought the gun's report unusually soft. Both Franz Ferdinand and Sophie were still sitting upright. Potoirek thought the shots had missed, but given the assult, ordered the driver to drive directly to the Governor's residence.
Arrest
Princip then turned the gun on himself, but was mobbed by the crowd. Police had to rescue Princip from the crowd before they could arrest him. Princip had swallowed his poison, but it was from the same batch as Cabrinovic's. He was violently ill, but did not die.
Mortal Wounds
As the car sped across the Lateiner Bridge, a stream of blood shot from Franz Ferdinand's mouth. He had been shot in the neck. Sophie, seeing this, exclaimed: "For Heaven's sake! What happened to you?" She sank from her seat. Potoirek and Harrach thought whe had fainted and were trying to help her up. Franz Ferdinand, knowing his wife better, suspected the truth. Sophie had been shot in the abdomen and was bleeding internally.
"Sopherl! Sopherl! " he pleaded. "Sterbe nicht! Bleibe am Leben für unsere Kinder! " (Sophie dear! Sophie dear! Don't die! Stay alive for our children!)
The cars rushed to the Governor's residence. Sophie may have died before they arrived. Franz Ferdinand died shortly afterward.
The July Crisis
The murders of Franz Ferdinand and Sophie brought Austro-Serbian tensions to a head. Serbia had been fomenting trouble for Austria for many years. For many in Vienna, the double murders provided the 'last straw' for a get-tough showdown. The trail back to the Black Hand would not be unraveled for years to come. Vienna felt she could not wait for conclusive proof and acted based on the mass of circumstantial evidence.
As Vienna took a hard line against Serbia, the other powers in Europe took sides. The wheels of war gained speed. The stakes far outgrew the squabble between Austria and Serbia. The Crisis of July turned into world war, just over thirty days after Franz Ferdinand and his wife Sophie were shot.
http://www.ku.edu/~kansite/ww_one/comment/sarajevo.html
