Other causes are all human induced. whether it's a water pumping, ground water pumping breaking it up, also, construction and all those trucks. water drainage patterns, they may change. someone may be changie ining thd thus, we can see a sinkhole. most likely it's this porous bedrock of limestone. >> our thanks to you. >> sure. casey anthony is back in the knews. she arrived at her bankruptcy hearing in tampa today. this is her first public appearance since she was acquitted of murdering her 2-year-old daughter in 2011. she is claiming about $1,000 in assets and almost $800,000 in liabilitie...