Sample bias. Just because you do not perceive it, does not mean the thing does not exist. LMGTFY: http://ukpmc.ac.uk/abstract/MED/10064320
Sure, it's not very recent, but nothing that happened during the 00s would leave me to believe the problem has somehow been solved.
About the sample bias, I agree with you, but if noone around you has ever heard or anyone dying of starvation in their lifetime (including your grandparents), the "sample" becomes more significant. Now, when people die of starvation, it's so extraordinary that they make movies about it ("Into the Wild" by Sean Penn - excellent movie, by the way).
http://www.washingtonpost.com/wp-srv/nation/documents/usda_r...
Food insecurity merely measures the subjective feelings of humans. If an obese person fails to consume his normal 4500 cals/day because he ran out of cash, this is counted as food insecurity.