President William McKinley was assassinated in 1901, and Theodore Roosevelt became President. At the time, many people felt that large trustswildlife refugescorporationsassembly linemuckrakersSelect your answer were using unfair business practices. Writers, known as malariamuckrakersaircraftcorporationstrustsSelect your answer, revealed dishonest business practices. Panama CanalmalariaUpton Sinclairaircraftassembly lineSelect your answer wrote about the meat- packing industry, and Ida Tarbell wrote about Standard Oil. Meanwhile, Roosevelt worked to reform large corporations. He believed the government should be able to break up wildlife refugesmalariatrustsassembly lineaircraftSelect your answer, or businesses that fixed prices to get rid of competition.

In 1903, Roosevelt purchased from Panama a ten-mile wide strip of land. Shortly after, Roosevelt began making plans to build the assembly linecorporationsaircrafttrustsPanama CanalSelect your answer. With a canal, ships would no longer have to travel around South America to reach the Caribbean Sea; it would cut 7,000 miles off such a trip. Building the canal was dangerous work, and many died from trustsmalariawildlife refugesUpton SinclaircorporationsSelect your answer and yellow fever.

In 1903, Orville and Wilbur Wright invented the first wildlife refugesassembly linetrustsmalariaaircraftSelect your answer with an engine. Orville made the first flight on December 17, 1903. In 1913, Henry Ford invented the corporationsaircraftUpton Sinclairassembly linemuckrakersSelect your answer and used it and interchangeable parts to mass-produce automobiles. President Roosevelt invented ways to protect our wilderness areas. He set aside about 150 million acres of land for national parks and national monuments, such as the Grand Canyon. Roosevelt also created Upton SinclairPanama Canalmalariawildlife refugestrustsSelect your answer where animals were safe from hunters.