Question: Schwarzenegger's goal was to become the greatest bodybuilder in the world, which meant becoming Mr. Olympia. His first attempt was in 1969, when he lost to three-time champion Sergio Oliva. However, Schwarzenegger came back in 1970 and won the competition, making him the youngest ever Mr. Olympia at the age of 23, a record he still holds to this day.
Is there an answer to this question: How old was Schwarzenegger when he won Mr. Olympia in 1970?

Answer: 23

Question: Kerry "has emerged in the past few years as an important envoy for Afghanistan and Pakistan during times of crisis," a Washington Post report stated in May 2011, as Kerry undertook another trip to the two countries. The killing of Osama bin Laden "has generated perhaps the most important crossroads yet," the report continued, as the senator spoke at a press conference and prepared to fly from Kabul to Pakistan. Among matters discussed during the May visit to Pakistan, under the general rubric of "recalibrating" the bilateral relationship, Kerry sought and retrieved from the Pakistanis the tail-section of the U.S. helicopter which had had to be abandoned at Abbottabad during the bin Laden strike. In 2013, Kerry met with Pakistan's army chief Gen. Ashfaq Parvez Kayani to discuss the peace process with the Taliban in Afghanistan.
Is there an answer to this question: What did Kerry get from the Pakistanis?

Answer: the tail-section of the U.S. helicopter which had had to be abandoned at Abbottabad during the bin Laden strike

Question: Jared Diamond describes an "Evil Quartet" of habitat destruction, overkill, introduced species, and secondary extinctions. Edward O. Wilson prefers the acronym HIPPO, standing for Habitat destruction, Invasive species, Pollution, human over-Population, and Over-harvesting. The most authoritative classification in use today is IUCN's Classification of Direct Threats which has been adopted by major international conservation organizations such as the US Nature Conservancy, the World Wildlife Fund, Conservation International, and BirdLife International.
Is there an answer to this question: What describes habitat destruction, overkill, introduced species, and organization extinctions?

Answer: unanswerable

Question: Infrared tracking, also known as infrared homing, refers to a passive missile guidance system, which uses the emission from a target of electromagnetic radiation in the infrared part of the spectrum to track it. Missiles that use infrared seeking are often referred to as "heat-seekers", since infrared (IR) is just below the visible spectrum of light in frequency and is radiated strongly by hot bodies. Many objects such as people, vehicle engines, and aircraft generate and retain heat, and as such, are especially visible in the infrared wavelengths of light compared to objects in the background.
Is there an answer to this question: What devices make use of infrared homing?

Answer:
Missiles