<Li> August 24 <Ul> <Li> A Russian Progress resupply vehicle that was destined for the International Space Station experienced a catastrophic engine failure . The unmanned craft failed to reach orbit and impacted in the Altai Republic . </Li> <Li> The ailing head of Apple Inc., Steve Jobs resigns . </Li> </Ul> </Li> <Ul> <Li> A Russian Progress resupply vehicle that was destined for the International Space Station experienced a catastrophic engine failure . The unmanned craft failed to reach orbit and impacted in the Altai Republic . </Li> <Li> The ailing head of Apple Inc., Steve Jobs resigns . </Li> </Ul> <Li> A Russian Progress resupply vehicle that was destined for the International Space Station experienced a catastrophic engine failure . The unmanned craft failed to reach orbit and impacted in the Altai Republic . </Li> <Li> The ailing head of Apple Inc., Steve Jobs resigns . </Li>

Important events in 2011 in the united states